IRS Audit in the United States: What to Do and What Not to Do

An IRS audit notice is one of the most stressful letters a taxpayer in the United States can receive, but an audit does not automatically mean you did something wrong. The Internal Revenue Service audits a small fraction of returns each year, often because of a mismatch, a random selection, or a deduction that falls outside the usual pattern. Knowing how audits work, what to do first, and what never to say can make the process far less damaging.

This guide explains the types of IRS audits, the steps to take when you receive a notice, the documents to gather, and the mistakes that turn a routine review into a bigger problem. It is general information, not tax or legal advice for your situation.

This article provides general legal information only. It is not legal advice, and it does not create a lawyer-client relationship. Tax rules and audit procedures change, so consult a licensed tax attorney or enrolled agent about your case.

Why the IRS Selects a Return for Audit

The IRS uses computer scoring, document matching, and random selection to choose returns for review. Common triggers include income reported by employers or banks that does not match your return, unusually large deductions compared with your income, cash-heavy businesses, and claims such as the earned income tax credit that require extra verification.

Most audits are correspondence audits, handled entirely by mail, and ask for proof of a few specific items. Fewer cases become office audits at an IRS office or field audits at your home or business, which are broader and more detailed. The notice you receive will say which type you face and what the IRS is examining.

What to Do First When You Get a Notice

First, read the notice carefully and note the tax year, the items under review, the response deadline, and the IRS contact information. Do not ignore it: missing the deadline can lead to additional tax being assessed automatically, even if you have proof that would have resolved the issue.

Second, verify the notice is genuine. The IRS generally contacts taxpayers by mail first, not by threatening phone calls or emails demanding immediate payment by gift card or wire transfer. If you are unsure, call the IRS at the number on its official website, not a number in a suspicious message.

What to Gather and How to Respond

Gather only the records the notice asks for, organized by item: W-2s and 1099s for income, receipts and mileage logs for deductions, bank statements, and contracts or invoices that support business expenses. Send copies, never originals, and keep a complete copy of everything you send, along with proof of mailing.

Answer each question directly and briefly. Provide the requested documents with a short cover letter that lists what is enclosed and identifies the tax year and notice number. Do not volunteer unrelated years, extra deductions, or explanations the IRS did not ask for, since each new statement can expand the scope of the review.

What Not to Do During an Audit

Do not alter, backdate, or create documents after receiving a notice. Fabricated records can turn a civil tax dispute into a criminal matter. Do not guess at numbers: if a record is missing, say so and provide the best available substitute, such as a bank statement or a statement from the payee.

Do not agree to an assessment you believe is wrong just to end the process quickly, and do not sign a waiver extending the statute of limitations without understanding what it means. You have the right to ask for time to review the IRS findings and to seek professional help before agreeing to anything.

Your Rights as a Taxpayer

Taxpayers have the right to be informed, to receive quality service, to pay no more than the correct amount of tax, and to challenge the IRS position and be heard. You may represent yourself, but you may also authorize a tax attorney, certified public accountant, or enrolled agent to act on your behalf with a power of attorney.

If you disagree with the audit result, you can request a meeting with the examiner's manager, appeal to the IRS Independent Office of Appeals, or, in some cases, take the case to Tax Court. Appeals must be filed by the deadline in your notice, so do not let that date pass while you are still deciding.

How a Tax Lawyer Helps

A tax lawyer is especially valuable when the audit involves a large amount, a business, unfiled years, or any risk of penalties for accuracy or fraud. A lawyer can manage communications with the IRS, protect privileged conversations, negotiate penalty relief where reasonable cause exists, and prepare an appeal or Tax Court petition if needed.

For a simple correspondence audit about one deduction, a qualified tax preparer may be enough. The key is to get advice early, before you send documents or make statements that are hard to undo later.

Common Audit Mistakes to Avoid

Common mistakes include missing the response deadline, sending original documents, over-explaining in writing, claiming expenses without records, and failing to report income that already appears on a 1099. Another frequent error is amending the return under audit without professional advice, which can create new inconsistencies.

Keep your audit file separate from your regular tax file, and note every call and letter with dates and names. A clear paper trail protects you if the case is transferred to another examiner or goes to appeal.

Making Your Final Decision

An IRS audit is serious, but it is a review process, not a verdict. Read the notice, meet the deadline, send organized copies of exactly what was requested, and avoid volunteering extra information or altering records. If the amount is large or the issues are complex, get a tax attorney or enrolled agent involved early.

Handled calmly and accurately, many audits close with only a small adjustment or no change at all. The taxpayers who fare worst are usually those who ignore the notice or rush to agree without checking the facts.

Disclaimer: This article provides general legal information only and is not tax or legal advice. IRS procedures, deadlines, and penalties change over time. For advice about your audit, consult a licensed tax attorney or enrolled agent.