by Ariful | Jun 26, 2026 | UK Updates
Who falls into the 2026 MTD mandate?
The first thing you need to determine is whether these rules apply to you. HMRC is phasing in MTD for ITSA based on your “qualifying income”, which is the total gross income from your self-employment and any other business activities before expenses.
- From April 6, 2026: You must comply if your combined qualifying income exceeds £50,000 per year.
- From April 6, 2027: The threshold drops, bringing in anyone with a qualifying income over £30,000.
If you are a UK e-commerce seller, whether you’re on Amazon, Shopify, eBay, or TikTok Shop, and your gross sales (not profit) hit these levels, you are legally required to join the MTD regime. This applies to individuals and sole traders; if you operate through a UK Limited Company, your MTD journey currently focuses on VAT, with further corporate tax updates expected in the future.
Master the move from annual to quarterly reporting
The biggest shift for e-commerce sellers is the frequency of communication with HMRC. The days of the “January rush” are coming to an end. Under MTD for ITSA, you will replace the single annual Self Assessment return with a structured cycle of digital updates.
Submit quarterly updates to stay compliant
Instead of one big filing, you will send four “quarterly updates” to HMRC. These updates aren’t full tax returns; they are digital summaries of your income and expenses. This keeps HMRC informed of your business performance throughout the year and helps you avoid nasty tax bill surprises at year-end.
Finalise with an End of Period Statement (EOPS)
Once your fourth quarter is finished, you will submit an End of Period Statement for each business you run. This is where you make final adjustments, such as claiming capital allowances or adjusting for stock levels.
Complete your Final Declaration
The last step is the Final Declaration. This brings together all your income sources, including dividends, interest, or employment income, to calculate your final tax liability. While this replaces the traditional tax return, the payment deadlines currently remain the same (January 31st).
Implement digital record-keeping for e-commerce success
At the heart of MTD is the requirement for “digital links.” This means you can no longer rely on manual data entry or paper ledgers. Every transaction, from a sale on Amazon to a refund on Shopify, must be recorded digitally.
Integrate your marketplaces directly
For e-commerce sellers, the challenge is often the volume of transactions. To remain compliant without spending hours on bookkeeping, you must use MTD-compatible software that integrates with your sales channels. This ensures that data flows from your marketplace to your accounting records without manual intervention, reducing the risk of errors that could lead to HMRC penalties.
Keep records in a “functional compatible software”
HMRC requires you to use software that can connect to their systems via an API. If you are still using basic spreadsheets, you will need “bridging software” to send your updates, though most growing SMEs find that a full-suite digital accounting system is far more efficient for scaling. You can learn more about avoiding common pitfalls in our guide to 7 mistakes you’re making with your Amazon accounting.
Your 2026 MTD compliance checklist
Preparing for 2026 starts now. Waiting until the deadline will only lead to stress and potential non-compliance. Follow this checklist to stay ahead of the curve:
- Review your 2024/25 income: Check if your gross turnover is likely to exceed the £50,000 mark.
- Audit your current software: Ensure your accounting tools are on HMRC’s approved list for MTD for ITSA.
- Establish digital links: Stop manual data entry between your sales platforms and your books.
- Register for MTD: Once the portal opens for your threshold, ensure you are registered well ahead of April 2026.
- Align your VAT and Income Tax: If you are already VAT registered, you are likely already using digital tools. Ensure these tools can also handle the new ITSA requirements to keep your compliance under one roof. Check the latest 2026 VAT updates to see how these overlap.
How we simplify your compliance journey
At Sterlinx Global, we aren’t just here to give advice; we are your compliance delivery partner. We understand that running a fast-growing e-commerce brand or digital agency is a full-time job. You shouldn’t have to spend your weekends worrying about quarterly update deadlines or digital link requirements.
We provide a structured, tech-driven system that handles the heavy lifting for you. From daily bookkeeping and VAT management to the complex transition into MTD for ITSA, we ensure your filings are accurate and on time. We specialize in cross-border compliance, so whether you are selling only in the UK or expanding across Europe and the USA, we have the infrastructure to support you.
If you are unsure whether your business is ready for the 2026 changes, don’t wait for the mandate to kick in. Let’s get your digital records in order today so you can focus on what you do best: growing your business.
Ready to master your property and business accounting before the 2026 deadline?
Contact us or Book a call with our compliance experts to discuss your MTD transition.
Frequently Asked Questions
Does MTD for ITSA apply to Limited Companies?
No, the April 2026 mandate specifically targets individuals, sole traders, and certain partnerships with income over £50,000. Limited Companies are already required to follow MTD for VAT, but MTD for Corporation Tax is a separate future development.
Can I still use spreadsheets for my e-commerce bookkeeping?
You can, but they must be “digitally linked” to HMRC via bridging software. However, for e-commerce sellers with high transaction volumes, manual spreadsheets are often inefficient and prone to errors. We recommend a fully integrated digital system.
What happens if I miss a quarterly update deadline?
HMRC is introducing a points-based penalty system. For every late submission, you will receive a point. Once you reach a certain threshold of points, you will be hit with a financial penalty. It is essential to keep your records up to date to avoid these unnecessary penalties.
by Ariful | Jun 25, 2026 | UK Accounting
The Invisible Risk of Shopify Success: Understanding Global Nexus
When you sell products through Shopify to customers in New York, Toronto, or Sydney, you aren’t just “exporting” goods; you are potentially creating a legal presence in those jurisdictions. This is known as “Nexus.” In the past, nexus was usually tied to physical presence, like a warehouse or an office. Today, “Economic Nexus” means that simply reaching a certain sales volume can trigger a mandatory requirement to register, collect, and remit taxes in that country.
Failing to identify these triggers early can lead to massive back-taxes, heavy penalties from foreign authorities like the IRS or the CRA, and even the suspension of your payment gateways. It is essential to transition from a reactive “year-end” accounting mindset to a proactive, data-driven compliance strategy.
US Sales Tax Nexus in 2026: Beyond Physical Borders
The United States presents the most complex challenge for UK Shopify sellers. Unlike the UK’s single VAT system, the US has over 11,000 different local tax jurisdictions across 50 states. By 2026, the rules for international sellers have tightened significantly.
Physical Nexus vs. Economic Nexus
Physical Nexus is triggered if you store inventory in a US warehouse (such as using a 3PL or Amazon FBA). If your goods are sitting in a warehouse in California, you likely have an obligation to register for sales tax in California from day one.
Economic Nexus, on the other hand, is based entirely on your revenue. While many states historically used a “200 transactions” rule, most have now moved toward a revenue-only threshold, typically $100,000 in sales into that specific state within a calendar year.
Register for sales tax immediately once you approach these thresholds to avoid paying those taxes out of your own profit margin. Remember, Shopify can calculate the tax for you, but it won’t register you with the state or file the returns: that is your responsibility. To see how common pitfalls can derail your growth, read our guide on 7 mistakes UK sellers make with 2026 US tax compliance.
Canada GST/HST: The CAD 30,000 Milestone
Canada is often the first international expansion point for UK brands due to the shared language and similar consumer habits. However, the Canada Revenue Agency (CRA) is diligent about non-resident compliance.
The threshold for mandatory registration in Canada is CAD 30,000 in taxable supplies over four consecutive calendar quarters. If your Shopify store reaches this volume in Canadian sales, you must register for a Business Number and begin charging GST/HST.
Maintain accurate records of where your Canadian customers are located. Rates vary by province: ranging from 5% GST in Alberta to 15% HST in the Atlantic provinces. Miscalculating these rates can result in the CRA auditing your international records, which is a headache no business owner needs.
Australia GST: Managing the AUD 75,000 Threshold
Australia has become a powerhouse market for UK e-commerce, but the Australian Taxation Office (ATO) has clear rules for “Low Value Imported Goods.” If your Australian-connected sales reach AUD 75,000 in any rolling 12-month period, you must register for Australian GST.
At Sterlinx Global, we provide a complete guide to Australian tax compliance to help you navigate these specific rules. The key takeaway for 2026 is that the ATO is increasingly using data-sharing agreements with platforms like Shopify and Amazon to identify non-compliant international sellers. Being “too small to notice” is no longer a viable strategy.
Why “Traditional” UK Accountants Often Fall Short
Most high-street UK accountants are excellent at managing your Companies House filings and your HMRC VAT returns. However, international tax is a specialized field. A traditional accountant might:
- Wait until year-end: They only see your international sales months after you’ve already crossed a nexus threshold.
- Lack US/AU/CA software integration: They might not know how to reconcile Shopify’s “payout” data with actual sales tax liabilities in 50 different US states.
- Miss the nuance of cross-border VAT: Understanding how UK VAT interacts with foreign sales tax is critical for your cash flow.
This is why we built Sterlinx Global. We aren’t a traditional consultancy that gives you a “to-do” list and leaves you to it. We are a Global Tax Compliance Suite. Our model is built on continuous data processing. You provide the data, and we complete the compliance: bookkeeping, tax calculations, and filings: across all your active jurisdictions.
The Power of a USA LLC for UK Shopify Sellers
If your US sales are growing rapidly, it may be time to consider a USA LLC. Operating as a UK Limited Company selling into the US is perfectly legal, but a USA LLC can provide several strategic advantages:
- Simplified Banking: Easier access to US-based payment processors and USD bank accounts, reducing foreign exchange fees.
- Market Credibility: Some US wholesalers and marketplaces prefer dealing with domestic entities.
- Strategic Compliance: A properly structured LLC can sometimes simplify the way you handle state-level filings.
However, a USA LLC comes with its own set of IRS reporting requirements, such as Form 5472 for foreign-owned corporations. We specialize in cross-border compliance, ensuring that your UK and US entities work together without creating a double-taxation nightmare.
How to Stay Compliant While Scaling in 2026
To protect your business, follow this simple checklist:
- Monitor your sales by region monthly: Do not wait for your accountant to tell you that you’ve exceeded a threshold.
- Audit your physical nexus: Are you using a US or EU warehouse? If so, you likely have immediate registration requirements.
- Integrate your tech stack: Ensure your Shopify tax settings are configured correctly for every region where you have nexus.
- Partner with a global specialist: Move away from local-only accounting and choose a firm that can handle UK, USA, Canada, and Australia compliance under one roof.
Take the Stress Out of Global Expansion
Scaling internationally should be an exciting milestone, not a source of legal anxiety. At Sterlinx Global, we take the complexity out of global tax compliance so you can focus on what you do best: growing your business.
by Ariful | Jun 24, 2026 | European VAT
Expanding your business across borders is an exhilarating milestone, but it often brings a complex guest to the party: cross border VAT. Whether you are a UK-based digital agency scaling into Europe or an international ecommerce brand entering the British market, staying compliant is the difference between sustainable growth and costly penalties.
In 2026, tax authorities like HMRC and the European Commission have tighter reporting requirements than ever. If you find yourself scratching your head over registration thresholds or “place of supply” rules, you aren’t alone. Many growing SMEs fall into the same traps.
This guide breaks down the seven most common mistakes businesses make with cross border VAT and provides clear, actionable steps to fix them before they impact your bottom line.
1. Treating UK and EU VAT as a Single System
One of the most frequent errors we see is the assumption that a UK VAT registration still grants access to the European Union’s single market rules. Since Brexit, the UK and EU are two entirely separate tax jurisdictions.
If you are a UK company selling to customers in France, Germany, or Ireland, your UK VAT number does not cover those sales. Conversely, if you are an EU-based seller moving goods into the UK, you must deal with HMRC directly.
The Fix: Audit your sales by destination. If you have customers in both the UK and the EU, you need a compliance strategy for both. This might mean maintaining a UK VAT registration for domestic sales and using the One-Stop Shop (OSS) or local registrations for your European customers. Don’t worry; we can help you map out exactly where your obligations lie.
2. Missing the “Nil Threshold” for Non-Resident Sellers
Most UK-based business owners know about the £90,000 VAT registration threshold. However, a critical mistake many international sellers make is assuming this threshold applies to them when they don’t have a physical presence (a “Fixed Establishment”) in the UK.
For non-resident businesses, such as a USA LLC or a Chinese brand selling via a UK warehouse, the VAT threshold is zero. This means you must register for VAT from your very first sale to a UK customer. Waiting until you hit a specific turnover figure is a recipe for backdated tax bills and hefty “failure to notify” penalties.
The Fix: Determine your residency status immediately. If you are selling goods or services into the UK and do not have an office or staff there, register for VAT right away. It is essential to be proactive to avoid the stress of an HMRC investigation later. You can learn more about this in our guide on UK VAT registration for growing SMEs.
3. Over-Relying on Marketplaces to Handle Everything
If you sell on Amazon, eBay, or Etsy, you might think, “The platform handles the VAT for me, so I don’t need to worry.” While platforms do act as the “deemed supplier” for certain transactions, collecting and remitting VAT on your behalf, this does not absolve you of all responsibility.
Marketplaces typically only handle VAT for specific scenarios, such as low-value imports or sales by non-UK sellers to UK customers. They do not handle your bookkeeping, they don’t file your nil returns, and they certainly won’t defend you in an audit.
The Fix: Maintain your own independent records. Compare your marketplace VAT reports against your actual sales data every month. Remember, even if the marketplace collects the tax, you may still have a legal requirement to be VAT registered and file regular returns to report those “deemed” sales. Utilizing professional vat return services uk ensures your filings are accurate and your data is reconciled.
4. Miscalculating the “Place of Supply” for Digital Services
For digital businesses like SaaS providers, app developers, and online consultants, the “Place of Supply” rules are the golden rule of cross border VAT. The general rule for B2C (Business-to-Consumer) digital services is that VAT is due in the country where the customer resides, not where your business is based.
If you are a UK digital agency selling a subscription to a user in Spain, you must charge Spanish VAT at the Spanish rate. Charging UK VAT or no VAT at all is a common mistake that leads to significant underpayments.
The Fix: Implement a system that captures the customer’s location at the point of sale (usually via IP address, billing address, or SIM card country code). Ensure your billing software is configured to apply the correct local VAT rate automatically. This will save you hours of manual corrections during your end-of-year filings.
5. Neglecting the One-Stop Shop (OSS) and Import OSS (IOSS)
Before 2021, selling across the EU required monitoring multiple “distance selling thresholds” in every country. Today, the EU has simplified this with the One-Stop Shop (OSS). Despite this, many businesses still struggle to use it or ignore it entirely, leading to a fragmented and expensive compliance mess.
- OSS: Allows you to report all B2C sales across all EU member states in a single quarterly return.
- IOSS: Designed for sellers importing low-value goods (under €150) into the EU, ensuring VAT is paid at the point of purchase rather than at the border.
The Fix: If you sell across multiple EU countries, register for the OSS. It drastically reduces the administrative burden of multiple local registrations. For businesses importing goods from outside the EU, IOSS can significantly improve the customer experience by preventing unexpected “customs fees” at the door.
6. Mixing Up B2B and B2C Transactions
The VAT treatment for selling to a business (B2B) is fundamentally different from selling to a private individual (B2C). In many cross-border B2B scenarios, the “Reverse Charge” mechanism applies, meaning the buyer accounts for the VAT, and you don’t charge it on your invoice.
A common mistake is failing to validate the buyer’s VAT number. If you treat a sale as B2B and don’t charge VAT, but your customer isn’t actually a registered business, you are liable for the missing tax.
The Fix: Always use a VIES (VAT Information Exchange System) or HMRC checker to validate VAT numbers before issuing a B2B invoice. Keep a record of this validation as part of your compliance audit trail. Doing this will save you from expensive disputes with tax authorities later.
7. Keeping Manual Records in a Digital-First World
The days of managing cross border VAT on a spreadsheet are over. With the UK’s Making Tax Digital (MTD) and similar digital reporting requirements across Europe, tax authorities now require “digital links” between your sales data and your tax return.
Manual data entry is not only slow; it is prone to human error. A single typo in a currency conversion or a missed transaction from a secondary payment gateway can lead to an incorrect filing and potential fines.
The Fix: Transition to a structured, tech-driven accounting system. At Sterlinx Global, we specialize in delivering accurate reporting through automated systems that pull data directly from your sales channels. Scaling your digital brand requires automation, not spreadsheets.
by Ariful | Jun 23, 2026 | UK Updates
Verify Your Identity: The 2026 Priority
If there is one thing you do today, ensure your identity is verified. One of the most significant changes under the Economic Crime and Corporate Transparency Act is the mandatory identity verification for all new and existing directors and Persons with Significant Control (PSCs).
By 2026, Companies House has fully integrated this system. If you fail to verify your identity, your filings could be rejected, and you may even face a fine or be barred from acting as a director.
Register your verification early to avoid bottlenecks. You can complete this through the Companies House portal or via an authorised intermediary. Taking five minutes to do this now prevents a massive headache when your annual accounts are due.
Secure an “Appropriate” Registered Office
Is your registered office still a PO Box? If so, you need to change it immediately. In 2026, Companies House no longer accepts PO Boxes as valid registered office addresses. Your address must be a physical location where someone can acknowledge receipt of documents.
If your address is deemed “inappropriate,” the Registrar has the power to strike your company off the register or change your status to “non-compliant.” For many small business owners, using a professional registered office service is the best way to maintain privacy while staying fully compliant.
Master the 2026 Tax Rates and Thresholds
Understanding your tax obligations is essential for proper accounting. For the 2026 financial year, the Corporation Tax and VAT landscapes have stayed relatively steady, but the thresholds remain critical for your cash flow planning.
Corporation Tax: The Three-Tier System
Your tax rate depends entirely on your profits. For the 2026 financial year:
- Small Profits Rate (19%): If your profits are £50,000 or less, you will pay 19%.
- Main Rate (25%): If your profits exceed £250,000, you will pay 25%.
- Marginal Relief: If your profits fall between £50,001 and £250,000, your tax rate will gradually increase from 19% to 25%.
VAT Thresholds
For the 2026–27 tax year, the VAT registration threshold remains at £90,000. If your taxable turnover over any rolling 12-month period hits this figure, you must register within 30 days. Conversely, if you want to deregister, your turnover must be expected to fall below £88,000.
Staying on top of these numbers is essential. Missing a VAT registration deadline is an easy way to incur heavy penalties from HMRC.
Prepare for the “Digital-Only” Filing Shift
The days of paper filings and joint submissions are officially over. As of April 1, 2026, HMRC has closed the joint filing service that allowed companies to submit accounts to Companies House and HMRC simultaneously.
What does this mean for you?
- Separate Filings: You now have to file your CT600 (Corporation Tax Return) with HMRC and your annual accounts with Companies House separately.
- Mandatory Software: You must use HMRC-recognised software to submit these returns. Manual online entry is being phased out in favour of API-driven software submissions.
- Detailed Disclosure: Small companies are now required to provide more detail in their accounts, including a Profit and Loss account, which was previously often “filleted” or omitted from the public record.
This change highlights the importance of having a robust digital bookkeeping system to handle these digital filings, ensuring that the data sent to both authorities is consistent and accurate.
Budget for Increased Filing Fees
Compliance is getting more expensive. From early 2026, the standard digital filing fee for a Confirmation Statement (CS01) has increased to approximately £50, up from the historical £13. Incorporations and other filings have seen similar hikes.
While these fees are a small part of your overall budget, they are mandatory. Ensure your accounting software or your accountant has budgeted for these increased costs so there are no surprises in your year-end reporting.
Your 2026 Compliance Checklist: The “Do This Now” List
To keep your business running smoothly, follow this structured checklist:
- [ ] Verify ID: Ensure all directors and PSCs have completed the Companies House identity verification process.
- [ ] Check Registered Office: Confirm your registered office is not a PO Box and is an “appropriate” physical address.
- [ ] Update Software: Ensure your bookkeeping software is compatible with HMRC’s 2026 digital filing requirements.
- [ ] Monitor Turnover: Keep a rolling 12-month log of your turnover to ensure you don’t miss the £90,000 VAT threshold.
- [ ] Set Deadlines: Mark your calendar for your Corporation Tax payment (9 months and 1 day after year-end) and your filing deadline (12 months after year-end).
- [ ] Review PSC Register: Companies House is moving to a centralized register. Ensure your information is up to date on their platform, not just in your internal files.
Why Compliance Is Your Growth Engine
It’s easy to view compliance as a burden, but in 2026, it is actually a competitive advantage. Clean accounts and an up-to-date filing record make your business “investment-ready” and simplify the process of applying for business loans or opening new banking facilities.
Outsourcing your compliance to a dedicated accounting service means you get:
- Daily Bookkeeping: Real-time visibility into your finances.
- VAT Management: Expert handling of registrations and quarterly filings.
- Year-End Accuracy: Professionally prepared accounts that meet the new 2026 disclosure standards.
- Peace of Mind: Knowing that every deadline is met and every new rule is followed.
Frequently Asked Questions
Can I still file “filleted” accounts in 2026?
The options for small and micro-entities to “fillet” or abridge their accounts have been significantly reduced. Most companies are now required to file a Profit and Loss account and a directors’ report, providing more transparency to the public record.
by Ariful | Jun 22, 2026 | UK Updates
1. Reporting Payouts Instead of Gross Turnover
One of the most dangerous mistakes you can make is using the “net payout”, the amount Amazon or Shopify actually deposits into your bank account, as your turnover figure.
HMRC expects you to report gross sales before any fees, shipping costs, or advertising spend are deducted. When Amazon sends its annual data report to HMRC, they report your gross sales. If you report the lower net amount, your tax return will show a significantly lower income than what HMRC sees on their end. This is a red flag for an audit.
How to fix it:
Always record your sales at the gross level. You should then record Amazon’s fees (FBA, storage, and referral) and Shopify’s transaction fees as separate business expenses. This ensures your turnover matches the platform data exactly, keeping your records transparent and compliant.
2. Falling into the “Marketplace VAT” Trap
Many sellers believe that because Amazon or Shopify (via certain apps) calculates and collects VAT on some transactions (like those under the IOSS or UK marketplace rules), they no longer need to worry about VAT compliance.
This is a misconception that can lead to massive underpayments. While marketplaces do “deemed supplier” VAT collection on specific cross-border sales, you are still responsible for calculating and reporting VAT on your domestic sales, monitoring your VAT registration threshold, and ensuring your accounting software correctly identifies which sales were “taxed at source.”
How to fix it:
Map your sales data by geography and tax responsibility. Use an ecommerce accountant UK to review your “VAT Transactions” reports from Amazon. This ensures you aren’t paying VAT twice on marketplace-collected orders, but more importantly, that you aren’t failing to pay it on your own taxable sales.
3. Ignoring the Reconciliation Gap
If you use accounting software like Xero or QuickBooks, you might think your data is “done” once the bank feed is reconciled. However, bank feeds only show the final payout. They don’t show the breakdown of refunds, chargebacks, or the specific VAT rates applied to different products.
HMRC’s 2026 audits focus heavily on “the trail.” If you cannot prove how a £10,000 payout from Shopify breaks down into individual sales, VAT, and shipping fees, HMRC may reject your expense claims or challenge your turnover figures.
How to fix it:
Perform a monthly reconciliation between your platform reports (Amazon Settlement Reports or Shopify Payout Reports) and your accounting software. Every penny must be accounted for. If you find this manual process overwhelming, structured bookkeeping services can automate this data flow for you.
4. Mismanaging Currency Conversion and Exchange Rates
For Shopify sellers using Shopify Payments or Amazon sellers trading in the EU, USA, or Canada, currency conversion is a constant source of data errors. If you sell $100 on Amazon US, you cannot simply record the GBP amount that arrives in your bank weeks later.
HMRC requires you to use an approved exchange rate at the time of the transaction or the time of the payout. Using “estimated” rates or the rate provided by a 3rd party payment processor without documentation can lead to inaccuracies in your VAT and Corporation Tax filings.
How to fix it:
Use a consistent, documented method for currency conversion. Most professional ecommerce sellers use specialized software that pulls the HMRC-approved daily rate. This ensures that your international compliance is bulletproof and your profit margins are accurately tracked.
5. Overlooking Ad Spend and FBA Fee Deductions
When HMRC audits an ecommerce business, they look for “unsupported expenses.” Many sellers download their Amazon 1099 or summary reports but fail to keep the actual invoices for Amazon Advertising (PPC) or monthly storage fees.
Because these fees are often deducted from your balance before you get paid, they can become “invisible” in your accounting if you aren’t careful. If you don’t have the specific VAT invoice for these services, you cannot legally claim the VAT back or deduct the full expense from your profits.
How to fix it:
Download and archive every tax invoice from the “Tax Document Library” in Amazon Seller Central or the “Billing” section of Shopify every month. Don’t rely on the platform to keep these forever; HMRC requires you to keep records for six years.
6. Incorrectly Handling Refunds and Returns
Returns are a fact of life in ecommerce, but they are an accounting nightmare. A common mistake is simply ignoring returns or recording them only when the cash is paid back to the customer.
However, a return usually involves a VAT adjustment and a reversal of the original sale. If you sold an item for £120 (including £20 VAT) and it is returned, you need to ensure that £20 is reclaimed on your VAT return. If you simply “net out” your sales, your audit trail becomes messy and harder to defend during a 2026 HMRC review.
How to fix it:
Ensure your data capture tool (like A2X or Link My Books) is configured to post refunds to a specific “Returns” account. This allows you to track return rates as a KPI while keeping your VAT reporting accurate. You can learn more about managing VAT for Amazon sellers to see how returns impact your bottom line.
7. Ignoring HMRC “Nudge” Letters
In 2026, HMRC is increasingly using “nudge letters”, polite but firm notifications that they have “information from third parties” suggests you may have under-declared your income.
The biggest mistake you can make is ignoring these or replying without a full data review. These letters are often the precursor to a full-scale audit. If you receive one, it means HMRC has already spotted a discrepancy in your Amazon or Shopify data.
How to fix it:
Don’t worry, but do act immediately. Conduct a “health check” on your last two years of filings. Compare your declared turnover against your platform gross sales reports. If there is a gap, making a “prompted disclosure” usually results in much lower penalties than waiting for a formal investigation.
