US business tax services are about making sure your business files the right forms, at the right time, without paying more than you actually owe. This is not a once-a-year task you hand off and forget about - it's an ongoing process that requires attention throughout the year.

These services cover federal corporate tax filing, state tax compliance, IRS reporting requirements, ongoing tax planning, and penalty mitigation. If you're a non-resident seller running a US entity, there's an additional layer of complexity involving specialized forms that most generalist firms simply aren't equipped to handle.

Several significant changes took effect in 2026, and many businesses haven't caught up. If you're still filing based on 2024 or 2025 rules, there's a real chance you're already behind - and "not knowing" is not a defense the IRS accepts.

2026 Compliance Changes - Key Updates Every Business Must Know

1. 1099 Reporting Threshold Dropped to $2,000

The 1099 reporting threshold dropped to $2,000 for 2026. Pay a contractor $2,000 or more during the year, and you're required to issue a 1099-NEC - no exceptions. Many small business owners are still working off the old $600 rule, which no longer applies. Missing this triggers tiered IRS penalties starting immediately.

2. Restored 100% Bonus Depreciation

Under the One Big Beautiful Bill Act, 100% bonus depreciation is back. Equipment, machinery, or qualifying property purchased and placed in service this year can be fully deducted in the current tax year rather than spread across years. For capital-heavy businesses, this is a genuine, significant tax reduction opportunity in 2026.

3. SALT Cap Increased to $40,000

The State and Local Tax (SALT) deduction cap jumped to $40,000. This matters most for pass-through entity owners in high-tax states like California, New York, and New Jersey, where state income taxes already take a significant bite out of business income.

4. BOI Reporting Now Actively Enforced

Federal and state taxes operate as two completely separate systems that don't always align. Understanding both is the baseline - it's what keeps you from being blindsided when you sit down to file. Getting one right and missing the other still leaves you exposed.

Federal Corporate Taxes

C-corporations pay a flat 21% federal corporate tax rate on net income. The rate itself hasn't changed, but how you arrive at net income - through deductions, timing decisions, and entity structure choices - is where real money gets saved or lost.

Pass-through entities like S-corps and partnerships work differently. There's no federal tax at the entity level; income flows through to the owners' personal returns. That's where the Qualified Business Income (QBI) deduction applies - up to 20% off taxable income for eligible businesses. Income phase-outs still apply for certain service businesses, so it doesn't automatically benefit everyone.

State Corporate Income Taxes

State rates range from 1% to 12%, and where you owe depends on where your business has nexus - physical presence, employees, or significant economic activity in a given state. For e-commerce sellers, nexus rules have expanded significantly. Selling into a state through an online platform doesn't automatically exempt you from that state's income tax obligations.

👉 Read our Comprehensive Guide to US Federal Business Tax Filing for a full state-by-state breakdown.

Most businesses get into trouble in one of two ways: they miss a form entirely, or they miss a deadline. Both carry real penalties, and the IRS makes no allowances for either. Being unaware is not a defense that reduces or eliminates liability.

Your EIN is the starting point for everything. Every US business entity needs one to open a bank account, hire employees, or file a federal return. If you're a non-resident operating a US LLC, you need your EIN before you can do almost anything else. The IRS Business Tax Account portal now handles estimated tax payments, transcript access, and payment plans online - worth setting up if you haven't already.

Small Business IRS Compliance Checklist 2026

Accurate filing is the floor, not the ceiling. Real tax reduction happens through planning ahead - and most small businesses are overpaying simply because they're not using deductions that are already available to them. These aren't loopholes; they're legitimate tools built into the tax code.

Section 179 Deduction

Section 179 lets you deduct the full purchase price of qualifying business equipment and software in the year you buy it, up to the annual inflation-adjusted limit. Combined with the restored 100% bonus depreciation, businesses making capital purchases in 2026 have genuine options for front-loading deductions rather than spreading them across years of depreciation schedules.

Qualified Business Income (QBI) Deduction

Operating as a pass-through entity - sole proprietorship, partnership, or S-corp - you may be able to deduct up to 20% of your qualified business income. Whether you actually qualify depends on your income level and business type. Service-based businesses in certain fields run into income caps that reduce or eliminate the deduction entirely.

S-Corp Election Strategy

Sole proprietors and single-member LLCs pay self-employment tax on all net income - 15.3% up to the annual ceiling. Electing S-corp status lets you split income between a reasonable salary and distributions. Self-employment tax applies only to the salary portion. For businesses netting $80,000 or more annually, the savings typically outweigh the additional compliance costs.

Timing Expenses Before Year-End

Prepaying certain business expenses, moving an equipment purchase forward, or deferring revenue into January - these moves can shift taxable income between years. None of it works if you're not looking at your numbers before December 31. By April, the year is over and your options are gone.

Most penalties come from ordinary situations - a missed deadline, a form the business owner didn't know about, or an assumption that the accountant had it covered. None of that factors into how the IRS responds. Penalties are calculated mechanically and compound monthly.

Running a US business from another country is genuinely common. The challenge is that the US tax system wasn't designed with that scenario in mind - the requirements are meaningfully different from domestic filing, and most US tax firms encounter this so rarely that they're simply not equipped to handle it properly.

Non-Resident Amazon Sellers - US Tax Obligations Explained

Consider a realistic scenario: a non-resident Amazon FBA seller operating through a US LLC has inventory in US warehouses, earns US-sourced income, and receives payments from Amazon into a US bank account. That creates a real US tax filing obligation - not optional, and not something you can ignore simply because you don't live in the United States.

Missing a tax deadline doesn't just delay the bill - it adds penalties on top of whatever you already owe. Quarterly estimated taxes apply whenever your business expects to owe $1,000 or more in federal tax for the year. Plan ahead; late is expensive.

Clear, direct answers to the questions businesses and non-resident sellers ask most often about US tax filing and compliance in 2026.