HOW-TO GUIDE
How to Respond to an IRS Audit — Step-by-Step Defense Guide 2026
Step-by-step guide to responding to an IRS audit — correspondence audits, office audits, field audits, documentation strategy, and Appeals procedures.
IRS Audit Types: What You're Facing
The IRS conducts three types of audits: (1) correspondence audits — conducted by mail, typically for specific items on the return (most common, lowest risk); (2) office audits — conducted at an IRS office, typically for Schedule C or rental income issues (moderate complexity); and (3) field audits — conducted at the taxpayer's home or business, typically for complex returns with large amounts at issue (highest complexity, highest risk).
The type of audit determines the response strategy. Correspondence audits can often be resolved by mail with proper documentation. Office and field audits require in-person representation and a more comprehensive documentation strategy. In all cases, do not go to an audit without representation — the IRS examiner is trained to ask questions that expand the scope of the audit.
| Audit Type | Conducted By | Location | Typical Issues | Complexity | Representation Recommended |
|---|---|---|---|---|---|
| Correspondence | IRS Service Center | By mail | Specific items (EIC, charitable deductions) | Low | Recommended |
| Office | IRS Revenue Agent | IRS office | Schedule C, rental income, EIC | Medium | Strongly recommended |
| Field | IRS Revenue Agent | Taxpayer's home/business | Complex returns, large amounts, fraud indicators | High | Essential |
Step-by-Step Audit Response Strategy
Step 1 — Read the Audit Notice Carefully: Identify the audit type, the tax year(s) under examination, the specific issues being examined, and the deadline to respond. The audit notice will specify what documentation is requested. Do not provide more than what is requested — only respond to the specific items in the notice.
Step 2 — Organize Your Documentation: Gather all documentation for the items under examination. For each item, you need: the original records (receipts, invoices, bank statements); a clear explanation of the business purpose; and documentation that the expense was paid (cancelled checks, credit card statements). Organize the documentation in the same order as the IRS's request.
Step 3 — Hire a Representative: For office and field audits, hire a CPA, EA, or tax attorney to represent you. Your representative can: attend the audit in your place (you do not need to be present); control the scope of the examination; negotiate with the examiner; and appeal unfavorable findings. The cost of representation is almost always less than the additional tax assessed in an unrepresented audit.
Step 4 — Respond Timely and Completely: Respond to the audit notice by the deadline. If you need more time, request a 30-day extension — the IRS almost always grants extensions. Send your response by certified mail with return receipt requested. Keep copies of everything.
Step 5 — Appeal Unfavorable Findings: If the IRS examiner proposes adjustments you disagree with, you have the right to appeal. File a written protest with the IRS Independent Office of Appeals within 30 days of the examination report. The Appeals Office has broad authority to settle cases — approximately 60% of audit cases are resolved favorably at Appeals.
Case Study: $45,000 Proposed Deficiency Reduced to $3,200
The IRS conducted a field audit of Robert's Schedule C return, proposing $45,000 in additional tax based on disallowed vehicle expenses ($22,000), home office deduction ($8,000), and meals and entertainment ($15,000). Robert's EA representative: (1) produced a contemporaneous mileage log showing 19,200 business miles; (2) provided a floor plan and photos of the home office (220 sq ft, exclusively used for business); (3) provided receipts and business purpose documentation for 85% of the meals and entertainment. The IRS accepted the documentation for vehicles and home office and disallowed only 15% of the meals and entertainment. Final assessment: $3,200 (vs. $45,000 proposed). Representative fee: $4,500.
Client Conversation Script
Client: 'I got an audit notice. The IRS wants to examine my Schedule C. What do I do?' Practitioner: 'First, do not respond to the IRS directly — let me handle it. Second, gather all your receipts, bank statements, and records for the items they are examining. Third, do not provide anything beyond what they specifically asked for. I will attend the audit in your place — you do not need to be there. The IRS examiner will ask questions designed to expand the scope of the audit, and I will control what information is provided. Most office audits can be resolved favorably with proper documentation. What year is the audit for?'
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Apply to Join the Marketplace →Frequently Asked Questions
A correspondence audit is conducted by mail for specific items on the return. An office audit is conducted in person at an IRS office and is more comprehensive. Office audits typically cover Schedule C, rental income, or EIC issues. Field audits are conducted at the taxpayer's home or business and are the most comprehensive.
No — you can authorize a representative (CPA, EA, or tax attorney) to attend the audit in your place by filing Form 2848 (Power of Attorney). Your representative can attend the audit without you and can prevent you from making statements that could be used against you.
The standard statute of limitations for IRS audits is 3 years from the return due date or filing date, whichever is later. The statute is extended to 6 years if income is understated by more than 25%. There is no statute of limitations for fraudulent returns or unfiled returns.
If you disagree with the audit findings, you can: (1) appeal to the IRS Independent Office of Appeals (file a written protest within 30 days); (2) pay the tax and file a claim for refund; or (3) file a petition with the U.S. Tax Court (if you receive a Statutory Notice of Deficiency). The Appeals Office resolves approximately 60% of audit cases favorably.
The IRS Independent Office of Appeals is an independent function within the IRS that resolves tax disputes without litigation. To appeal, file a written protest within 30 days of the examination report. The Appeals Officer will review the case and negotiate a settlement based on the hazards of litigation. Appeals is less formal than Tax Court and resolves most cases within 6–12 months.
Generally, the IRS cannot audit the same tax year twice. However, there are exceptions: if new information comes to light (e.g., a third-party informant), if the prior audit was limited in scope, or if fraud is suspected. The IRS must obtain managerial approval to reopen a closed audit.
The Discriminant Function System (DIF) is the IRS's statistical model for selecting returns for audit. Returns with high DIF scores are more likely to be selected. The DIF score is based on how your deductions compare to statistical norms for taxpayers with similar income and occupation. High deduction ratios relative to income generate high DIF scores.
The information on this page is intended for licensed tax professionals (CPAs, EAs, and tax attorneys) and is provided for educational and research purposes only. Tax law is complex and fact-specific — all strategies discussed are subject to limitations, phase-outs, and conditions that may not apply to every client situation. Practitioners should independently verify all information against current IRS guidance, Treasury Regulations, and applicable state law before advising clients. This content does not constitute legal or tax advice.
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