Looking For USA Tax Updates? Here Are 5 Critical IRS Changes International Sellers Need to Know Today

by Ariful | May 23, 2026 | US Updates

If you are selling into the United States from abroad, you already know that the tax landscape feels like it's shifting under your feet every few months. As we move further into 2026, the IRS and state tax authorities have stopped merely "suggesting" compliance, they are now enforcing it with tools we haven't seen before.

I’m Ariful Islam, Managing Director at Sterlinx Global, and I’ve spent the morning looking over the latest internal briefs on how these changes are hitting our international clients. To be blunt: the "wait and see" approach to USA tax is officially dead. Whether you are a high-growth e-commerce brand or a digital service provider, these five updates are going to dictate your profitability this year.

Let’s break down what’s happening right now and how you can stay ahead of the curve.

1. Remote Sales Tax Thresholds: The "Transaction Count" Era is Ending

For years, international sellers lived by the "200 transactions or $100,000" rule for most states. It was the standard economic nexus benchmark. But as of 2026, we are seeing a massive shift. Major states, led by Illinois, have officially recalibrated their thresholds.

Starting January 1, 2026, Illinois removed the transaction count entirely. Now, you trigger a registration requirement based solely on $100,000 in cumulative gross receipts.

Why this matters for you:
If you sell high-value items, you might have stayed under the 200-transaction limit and avoided sales tax registration in the past. That protection is gone. If your U.S. revenue is growing, you are likely hitting nexus in more states than you realize. At Sterlinx Global, we see many sellers who assume their home country entity protects them from U.S. state taxes. It doesn't. Once you cross that dollar threshold, the state expects you to register, collect, and remit.

2. The New 1% Federal Fee on International Remittances

This is one of the most significant "hidden" costs to emerge in 2026. Under new federal guidelines that took effect on January 1, the U.S. has implemented a 1% federal fee on certain international remittances.

If you are a non-U.S. business owner sending your U.S. profits back to a bank account in the UK, Europe, or Canada, this fee could apply to your transfers. It isn't an income tax; it's a transaction-level fee.

How to handle this:

• Audit your transfer methods: Not all payment rails are treated equally.
• Use electronic funding: The IRS is heavily favoring electronic trails.
• Factor it into your margins: A 1% hit on every transfer back home can eat into your net profit quickly if you aren't accounting for it in your product pricing.

Don't let this catch you off guard. We help our clients manage these daily data flows to ensure that when money moves, the compliance side is already handled.

3. IRS AI Enforcement: The End of "Invisibility"

You might have heard the buzz about the IRS getting a massive tech upgrade. Well, in 2026, that AI is fully online. The IRS is now using advanced data matching to cross-reference your marketplace reports (like 1099-Ks from Amazon or Shopify) with foreign bank data provided through FATCA and FBAR agreements.

In the past, an international seller might have "forgotten" to file certain informational forms, thinking the IRS wouldn't notice a foreign-owned LLC with no physical U.S. presence. Those days are over. The AI systems are designed to flag discrepancies automatically.

The Sterlinx approach:
We don't just "do taxes" at the end of the year. We operate as a Global Tax Compliance Suite. This means we take your data daily, calculate what’s owed, and ensure your filings match the digital footprint you’re leaving across the web. If the IRS AI looks at your business, we want it to find a perfect match between your sales and your filings.

4. Compliance Complexity: It’s More Than Just Registering

Many sellers think that once they have a sales tax permit, the job is done. Unfortunately, in 2026, the states have become much more aggressive about "secondary" compliance. We are seeing a spike in notices for:

• Incorrect Sourcing: Are you charging tax based on where you are or where your customer is? Getting this wrong in a "destination-based" state can lead to massive back-tax liabilities.
• Marketplace vs. Direct Sales Mismatches: If you sell on Amazon (where they collect tax) and your own Shopify site (where you collect tax), your filings must clearly distinguish between the two. States are now auditing these reports to ensure you aren't under-reporting your direct-to-consumer sales.
• Exemption Certificate Management: If you are a wholesaler, you must have valid, up-to-date certificates for every customer you don't charge tax.

It sounds like a lot because it is. This is why we tell our clients: you focus on the growth, and let us handle the daily compliance grind. To understand more about what happens if you miss these, check out our guide on tax deadlines and penalties.

5. The Section 122 Import Surcharge

If you are importing goods into the U.S., the rules changed significantly on February 24, 2026. The legacy IEEPA tariffs have been restructured into the new Section 122 import surcharge.

This isn't just a name change; it’s a restructuring of how duties are calculated for international sellers. If your supply chain relies on importing bulk inventory into U.S. warehouses (like Amazon FBA), your landed cost has likely changed in the last few months.

Action Plan:
Review your customs entries from March and April. If you haven't updated your duty calculations, you might be underpaying, which leads to "Customs and Border Protection" (CBP) fines, or overpaying, which kills your margins.

Moving From "Advisory" to "Execution"

At Sterlinx Global, we see a lot of business owners who are paralyzed by "advisory." They have 50-page tax plans but no one actually filing their returns. We do things differently. We are an end-to-end compliance delivery firm.

You provide the data; we complete the compliance.

Whether it's your USA LLC's year-end accounts or your monthly sales tax filings across 20 different states, we make sure it’s done right and on time. We also handle cross-border needs for UK Limited Companies and Canadian Corporations selling into the States.

Frequently Asked Questions

Do I need a U.S. entity to sell in the USA?

No, you can sell as a foreign entity, but you will still have "Nexus" (a tax connection) once you cross certain revenue thresholds. Many sellers choose to form a USA LLC for ease of banking and liability protection, but your tax obligations exist regardless of your entity type.

What is the difference between Sales Tax and Income Tax?

Sales Tax is collected from the customer at the point of sale and passed to the state. Income Tax is paid on the profits your business makes at the end of the year. International sellers often have to deal with both.

Does Amazon handle all my sales tax?

Amazon (and other marketplaces) acts as a "Marketplace Facilitator" in most states, meaning they collect and remit tax on your behalf for sales made on their platform. However, you may still be required to register in those states and file "zero-tax" returns to show the state you are compliant. Furthermore, if you sell on your own website, Amazon won't help you there.

How do I know if I have "Nexus"?

Nexus is triggered by physical presence (inventory in a warehouse) or economic presence (hitting revenue thresholds like $100,000). If you use 3PLs or Amazon FBA, you likely have physical nexus in multiple states immediately.

Can Sterlinx Global help with my UK and USA taxes at the same time?

Absolutely. We specialize in international entities. We can manage your UK Limited Company compliance (VAT, bookkeeping, year-end) while simultaneously handling your U.S. Sales Tax and LLC filings.

Don't Let 2026 Be the Year of Tax Audits

The IRS is faster and smarter than ever before. But that doesn't mean you have to slow down your expansion. With a structured compliance partner, these updates are just minor administrative hurdles rather than business-ending roadblocks.

If you’re feeling overwhelmed by the new 1% remittance fee, the Section 122 surcharges, or the shifting sales tax thresholds, let’s get it sorted.

Stop worrying about the IRS and start focusing on your next product launch.

Contact us today to speak with our team about how we can take the daily weight of U.S. tax compliance off your shoulders.

Latest USA Tax Changes Explained in Under 3 Minutes: What UK Limited Companies Need to Know

by Ariful | May 23, 2026 | US Updates

Expanding your UK Limited Company into the United States is one of the most exciting milestones for any digital business or e-commerce brand. However, the American tax landscape is notorious for its complexity. As we navigate the 2026 tax year, the IRS has ramped up its focus on international transparency, making it vital for UK directors to understand where they stand.

If you are a UK business owner with US customers, a US entity, or even just US-based shareholders, the rules have shifted. Missing a single filing can lead to eye-watering penalties that start at $10,000.

Here is everything you need to know about the latest USA tax status for UK Limited Companies, broken down so you can get back to growing your business.

The 3-Minute Summary: What’s New in 2026?

The US federal corporate tax rate remains steady at a flat 21%. While there was much debate in Congress leading into 2026 regarding rate adjustments, the focus has shifted from raising the headline rate to tightening enforcement on "foreign-owned" entities.

For UK Limited Companies, the biggest "change" isn't a new law, but the way the IRS is using data sharing with HMRC to identify non-compliant sellers. If you have any of the following, you are on the radar:

• A US LLC or Corporation acting as a subsidiary.
• Physical stock held in US warehouses (Amazon FBA or 3PL).
• US-based directors or shareholders holding more than 10% of your UK company.

The "CFC" Trap: Are You a Controlled Foreign Corporation?

One of the most misunderstood areas for UK business owners is the Controlled Foreign Corporation (CFC) status. In the eyes of the IRS, if more than 50% of your UK Limited Company is owned by "US Persons" (which includes US citizens living in the UK), your company is a CFC.

Even if you are the sole director living in London, if you hold a US Green Card or dual citizenship, your UK company is subject to heavy US reporting.

Why this matters now:

In 2026, the IRS has increased its automated matching of Form 5471. This is the "Information Return of U.S. Persons With Respect to Certain Foreign Corporations." If your UK company qualifies as a CFC and you fail to file this form, the penalty is $10,000 per year, and it does not max out easily.

The 2026 UK Connection: Threshold Reductions

While we are discussing US tax, we cannot ignore the changes happening back home in the UK. For the 2025 and 2026 financial years, the UK's £50,000 and £250,000 corporation tax thresholds are reduced for "short accounting periods" and associated companies.

If you have set up a US entity to handle your North American sales, the UK tax authorities may view your US Corp and your UK Ltd as associated companies. This effectively halves your tax thresholds in the UK, potentially pushing you into the 25% UK Corporation Tax bracket much sooner than you anticipated.

Navigating the interplay between US and UK tax rates is where most SMEs stumble. You can read more about managing these cross-border complexities in our guide on how to manage cross-border VAT and UK tax.

GILTI and the High-Tax Exclusion

If your UK company is considered a CFC, you are likely subject to GILTI (Global Intangible Low-Taxed Income). This rule was designed to prevent companies from shifting profits to low-tax jurisdictions.

The good news for UK companies in 2026? Since the UK's main corporation tax rate is 25%, most businesses can claim the GILTI High-Tax Exclusion.

• The Rule: If your foreign (UK) effective tax rate is at least 18.9% (90% of the US 21% rate), you can often exclude that income from US tax.
• The Catch: You still have to do the paperwork. You don't get the exclusion automatically; it must be elected on your tax return.

Form 8832: The "Check-the-Box" Strategy

Many UK founders are choosing to "Check the Box" using Form 8832. This allows you to tell the IRS how you want your entity to be taxed. For a single-member UK Limited Company, you could elect to be treated as a "disregarded entity."

The Benefit: It eliminates the need for the complex Form 5471 and GILTI calculations.
The Risk: It subjects all your UK profits to US self-employment tax (roughly 15.3%).

For high-growth e-commerce brands, this is often a bad move. It’s essential to look at your long-term profit projections before making an election that is hard to undo. If you're looking for more specific updates for international sellers, check out our latest post on US tax updates for international sellers.

Nexus and Sales Tax: The Silent Profit Killer

Beyond federal income tax, 2026 has seen a massive surge in State Sales Tax enforcement. If you are selling physical goods into the US, you likely have "Economic Nexus" in several states.

Most states have a threshold of $100,000 in sales or 200 transactions. Once you hit that, you are legally required to register, collect, and remit sales tax.

• Don't wait for a letter: The IRS and state departments of revenue are increasingly sharing data with marketplaces like Amazon and Shopify.
• Keep records: Your bookkeeping must distinguish between sales in different states to ensure accurate filings.

At Sterlinx Global, we handle the heavy lifting of Sales Tax registrations and filings so you can focus on your product line.

Your 2026 Compliance Checklist

To stay on the right side of both the IRS and HMRC this year, follow this simple checklist:

1. Identify Ownership: Confirm if any shareholders are "US Persons" (Citizens or Green Card holders).
2. Determine Nexus: Calculate your total sales per US state to see if you’ve triggered Sales Tax obligations.
3. Review Associated Companies: Check if your US and UK entities are splitting your UK tax thresholds.
4. File Form 5471/8832: Ensure these are submitted alongside your US personal or corporate tax returns.
5. Claim Tax Credits: Utilize the US-UK Double Taxation Treaty to ensure you aren't paying tax twice on the same pound of profit.

Frequently Asked Questions

Do I need to pay US tax if I only sell online from the UK?

If you have no physical presence (employees or inventory) and no "dependent agents" in the US, you may be exempt from federal income tax under the treaty. However, you are still liable for State Sales Tax if you meet the economic nexus thresholds.

What is the penalty for late US tax filings?

For international forms like 5471 or 5472, the penalty usually starts at $10,000 per form, per year. The IRS has become much less lenient with "reasonable cause" excuses in 2026.

Does the UK-US tax treaty cover everything?

No. The treaty primarily covers income tax and prevents double taxation. It does not cover Sales Tax or Social Security (unless a separate Totalization Agreement is applied).

Can I manage US tax compliance myself?

Technically, yes. Practically, it is a high-risk move. US international tax forms are some of the most complex documents in the accounting world. One mistake in "checking the box" can cost you thousands in unnecessary taxes.

How Sterlinx Global Can Help

We aren't just here to give advice; we are here to execute. Sterlinx Global is a Global Tax Compliance Suite designed for the modern international business. We don't just tell you that you need to file; we take your data, calculate your liabilities, and handle the filings for you.

Whether you need full-suite accounting for your UK Limited Company or modular Sales Tax support for your US expansion, our team ensures you stay compliant every single day. Don't let tax complexity hold back your global growth.

Ready to get your US tax compliance sorted?
Contact us or Talk to an expert today to book a call.