IRS Notices and Identity Verification Checklist

Start by confirming the notice is real

Every year millions of letters go out under IRS letterhead, and a growing share of scam mail copies that format closely. Before doing anything else, check the notice number in the top corner (it usually starts with CP or LTR) against the official notice index, and confirm the return address matches a real IRS processing center rather than a generic post office box. IRS tax information published on the agency's own reference pages describes exactly what legitimate notices look like and what they never ask for.

A genuine notice never demands payment by gift card, wire transfer, or cryptocurrency, and it never threatens immediate arrest. If a letter pressures you to act within hours, that pressure itself is a warning sign. Set the letter aside for a moment, locate your prior irs tax account correspondence if you have any, and compare the formatting, the notice number, and the specific tax year referenced before treating anything in it as fact.

Identify exactly what the notice is asking you to do

Notices fall into a handful of categories: a math error adjustment, a request for missing information, a proposed balance due, an audit inquiry, or an identity verification request tied to a return the agency has flagged. Read the notice twice and write down, in your own words, the single action requested. Some letters only require a phone call; others require mailed documentation; a smaller set require you to appear in person or use an online identity verification information tool tied to a specific case number.

Do not assume the letter matches your memory of what you filed. Pull your own copy of the return in question and match line items directly against what the notice cites. Confusing one tax year's notice with another year's return is one of the most common errors people make when they skim rather than read closely.

Verify the deadline and what happens if you miss it

Every notice states a response window, typically 30 or 60 days from the date printed on the letter, not the date you opened the envelope. Confirm that date against your calendar immediately, because missing an irs filing deadline tied to a notice response can lock in an assessment or forfeit your right to dispute it administratively. If the deadline has already passed, check whether the notice mentions a right to request additional time or file late with an explanation.

This is a separate situation from an irs filing extension on an original return, which only extends time to file, not time to pay or time to respond to a notice already issued. Do not confuse the two processes, and do not assume an extension you filed earlier automatically applies to a later notice.

Match identity verification requests to a real case

Identity verification letters, often numbered 5071C, 4883C, or 5747C, are issued when a filed return is held for review because something about it triggered an identity check. Before verifying anything online or by phone, confirm the notice references a return you actually filed, for the tax year you actually filed it. If you did not file a return for that year, this is itself important information and should be treated as a possible identity theft signal rather than a routine step.

Verification typically requires your prior year return, current year return if filed, and government-issued identification. Gather these documents before starting the process so you are not verifying under time pressure with incomplete records. If phone lines are unavailable, in-person verification at a local office is often listed as an alternative on the same notice.

Cross-check whether an amended return is actually needed

Some notices propose a correction and simply ask you to agree or disagree; others require you to file a corrected return yourself. Read the specific instructions carefully, because filing an irs amended tax return when it was not requested can create a duplicate record and slow down resolution rather than speed it up. Only submit an amendment if the notice explicitly asks for one, or if your own review of the return confirms an error the notice did not catch.

If an amendment is needed, gather the original return, the notice, and any supporting documents such as corrected income statements before completing the amended form. Keep a copy of everything mailed, along with proof of mailing, since amended paper returns can take considerably longer to process than an original electronic filing.

Confirm your account status before assuming a balance is owed

A notice proposing additional tax is not the same as a finalized bill. Before arranging any irs payment options or considering an irs payment plan information request, check whether the proposed amount has actually posted to your account or is still under review. Requesting a transcript is the most reliable way to see current status: an account transcript shows the actual assessed balance, separate from what a notice proposes.

If you disagree with a proposed amount, the notice will explain how to respond in writing with supporting documents rather than paying first and disputing later. Paying before checking your actual account status is one of the more common ways people overpay or lock in an assessment that could have been contested.

Keep records that make follow-up faster later

Once you've read the notice, checked the deadline, and identified the required action, keep a dedicated file with the notice itself, any response you send, proof of mailing, and confirmation numbers from calls. This habit matters more than it seems, because a second notice on the same issue is common, and having the full paper trail lets you or anyone helping you resolve it without starting research over. A tidy record also makes any future review of irs tax return instructions or related filings much faster to complete.