Overview

An IRS field audit (in-person, often at the taxpayer’s home, place of business, or the IRS office) requires more detailed documentation than a correspondence audit. A clear, prioritized evidence checklist helps you and your representative show compliance, narrow the scope of the audit, and shorten the agent’s review time. Use this checklist to gather documents that verify income, expenses, deductions, credits, and identity before the agent arrives.

This article provides a practical, step-by-step checklist, notes on how the IRS evaluates evidence, alternative documentation when originals are missing, organization tips I use in practice, and instructions for what to do during the agent’s visit. It also links to related guides for deeper reading.

Sources: IRS guidance on audits and appeals (see IRS.gov) and IRS Publication 556 for appeals procedures (https://www.irs.gov/pub/irs-pdf/p556.pdf).

Quick preparation checklist (at-a-glance)

  • Bring the original audit notice and any IRS correspondence.
  • Assemble primary income documents: W-2s, 1099s, K-1s, brokerage statements, and bank statements.
  • Gather expense evidence: receipts, invoices, credit-card statements, canceled checks, and mileage logs.
  • Collect documents supporting deductions and credits: mortgage interest statements, medical bills, charitable receipts, tuition statements (Form 1098-T), and childcare provider information.
  • Identity and verification: SSN cards (or equivalent), copies of prior-year returns, driver’s license or passport, and business registrations or EIN letters if applicable.
  • Organize files by tax year and by schedule/issue (e.g., Schedule C, Schedule A, credits).
  • Prepare a concise summary memo for each issue showing totals, calculations, and sources for quick review by the agent.

Detailed evidence checklist

Use the lists below to make folders (digital and/or physical). Label each folder with the tax year and issue.

Income verification

  • W-2 wage and tax statements.
  • 1099 forms: 1099-NEC, 1099-MISC, 1099-INT, 1099-DIV, 1099-B, 1099-R.
  • K-1s (partnerships, S corporations, trusts).
  • Broker statements (year-end consolidated statements showing proceeds and cost basis).
  • Bank statements showing deposits and transfers tied to income sources.
  • Cash receipts, point-of-sale reports, or merchant account statements for cash-heavy businesses.

Business and expense documentation (Schedule C and similar)

  • Receipts and invoices for purchases and services.
  • Credit-card statements and canceled checks that tie to claimed expenses.
  • Detailed mileage logs showing date, business purpose, start/stop odometer readings, and miles.
  • Lease or rental agreements for business property.
  • Contracts, purchase orders, and client invoices.
  • Payroll records, if employees are paid.

Deductions and credits

  • Mortgage interest statements (Form 1098) and property tax receipts.
  • Medical and dental bills, insurance statements and explanation of benefits (EOBs).
  • Charitable contribution receipts, canceled checks, and acknowledgements from charities for gifts over $250.
  • Education expense documents (Form 1098-T, students’ billing statements, receipts for qualified expenses).
  • Childcare provider information including provider’s name, EIN/SSN, and receipts.
  • Retirement account contribution records and rollovers.

Identity, prior-year returns, and supporting records

  • Social Security cards (or other SSN documentation) and valid photo ID.
  • Copies of tax returns for the years under examination and one year prior.
  • Business licenses, state filings, and employer identification number (EIN) letters.

Alternative and secondary evidence
When originals are missing, the IRS accepts alternative documentation if it’s credible and contemporaneous:

  • Bank and credit-card statements showing the payment.
  • Third-party invoices and letters from vendors or clients.
  • Digital copies (scanned PDFs) with metadata or e-mail chains to show dates.
  • Substantiation worksheets (e.g., for meals and mileage) created close to the event date.
    See our guide on alternative documentation for more detail: [Understanding alternative documentation during an audit](