IRS Notice CP2000: What It Means and What to Do

Why did I get a CP2000?

Common reasons include:

• Income reported to the IRS on a Form W-2, 1099 or similar form that was left off the return
• A payer reported an amount that differs from what you reported
• Income from payment apps, online marketplaces, banks or brokers that was missed or reported differently
• Deductions, credits or payments on the return that don't match third-party records (for example, Form 1098)
• A payer's information return that is itself wrong, or income reported under your SSN because of identity theft

What should I do?

1. Read the whole notice and compare each item the IRS lists with your tax return and your W-2s, 1099s and other income records.
2. Decide whether you agree with all, some or none of the proposed changes.
3. If you agree, sign the response form (both spouses sign if you filed jointly) and return it by the response date; you can pay now or wait for the IRS to adjust your account and send a bill.
4. If you disagree with some or all of the changes, mark the appropriate box on the response form and include a signed statement explaining why, plus supporting documents.
5. Send your reply by the IRS Documentation Upload Tool, by fax, or by mail to the address on the notice, using the instructions on the notice and the IRS CP2000 page.
6. If you need more time, call the number on the notice or request an extension by mail or fax before the response date.
7. Only file Form 1040-X if the notice is correct and you also have other income, credits or expenses to report; write "CP2000" at the top of it.

What documents do I need?

• The CP2000 notice and its response form
• A copy of the tax return for the year shown on the notice
• All Forms W-2, 1099, 1098 and other income or payment documents for that year
• Corrected forms or a statement from the payer if their information was wrong
• Records supporting any expenses or deductions related to the income in question
• Form 14039 (Identity Theft Affidavit) if the income isn't yours because of identity theft

What should I avoid?

• Don't ignore it because it isn't a bill; if the IRS doesn't hear from you by the response date, it generally moves to a Statutory Notice of Deficiency.
• Don't file an amended return just to respond; in most cases the response form is enough.
• Don't send original documents; send copies.
• Don't sign the agreement if you disagree with any of the changes.

What if I disagree with a CP2000?

Mark the disagree box on the response form (it covers disagreeing with some or all of the changes), and send a signed statement explaining why, with supporting documents, by the response date. You can call the number on the notice to talk with an examiner and, if needed, ask for a manager. The IRS appeals page says you can submit a request for appeal/protest to the office that sent the letter, and you should file it within 30 days from the date of the letter. If the issue isn't resolved, the IRS will send a Statutory Notice of Deficiency, after which you may petition the U.S. Tax Court.

What happens if I ignore a CP2000?

If the IRS doesn't hear from you by the response date, it will generally send a Statutory Notice of Deficiency (CP3219A) and, if that isn't resolved or petitioned to Tax Court, assess the tax and send a bill. The CP2000 amount generally includes interest from the return's due date, interest keeps accruing until paid, and certain penalties may apply even if not shown.

What else should I know about CP2000?

The CP2000 comes from the IRS Automated Underreporter program, which matches your return against W-2, 1098, 1099 and similar forms; that matching takes months, so the notice often arrives long after you filed. It is a proposal, not a bill, and the response form lets you disagree with only some of the items. If you partly agree, address each item separately, because the IRS can issue a revised notice for only the unresolved items. Many mismatches come from forms that were reported under your number but belong elsewhere or were reported incorrectly by the payer, so a corrected form or a payer statement can resolve them. Per Publication 5181, if you want to stop interest while you dispute, you can pay the proposed amount and designate it as a "6603 deposit." Missing the response date usually leads to a Statutory Notice of Deficiency, which starts a strict Tax Court deadline.