IRS CP2000: what it means and what to do
The IRS is proposing changes to your tax return because income or payment information it received from third parties does not match what you reported. It is not a bill, but you may need to respond. This summary is drawn from the IRS page for the CP2000, last checked on October 13, 2026.
Why you received a CP2000
- Income or payment information reported by third parties, such as employers or financial institutions, does not match your return
- The difference may increase, decrease, or not change your tax
What to do
- Review the entire notice and follow its instructions
- Reply by the date listed on the notice
- If a response form is included, complete, sign, and return it saying whether you agree or disagree
- Attach any supporting documents
- If you agree and have nothing else to report, you do not need to amend your return
Deadline: Reply by the date listed on the notice
If you disagree, or do not respond
Reply using the response form (or the method in the notice), state that you disagree, and include supporting documentation. Publication 5 explains appeal rights and how to prepare a protest.
If you don't reply or the discrepancy can't be resolved, the IRS may send another notice and a bill.
Get your records together first
Most notices come down to matching what the IRS has on file against your own records. Before you reply, pull the return the notice refers to, the bank statements and income forms for that year, and any payment confirmations. If your books are reconciled to the bank, that comparison takes minutes instead of days.
Source and verification
IRS: Understanding your CP2000 series notice →
Last verified against that page on October 13, 2026. This is general information, not advice for your situation. The notice itself is the authority on your amounts and dates. Talk to a CPA or enrolled agent if the amounts are large or you are unsure.
Related
- All IRS notices explained
- IRS CP14 — The IRS says you owe money on unpaid taxes.
- IRS CP501 — This is a reminder that you still owe a balance on one of your tax accounts.
- IRS CP503 — This is your second reminder that you have an unpaid balance on one of your tax accounts, because the IRS hasn't received your payment or a response to earlier notices.
- IRS CP504 — This is a Notice of Intent to Levy under Internal Revenue Code section 6331(d) and a final reminder that the IRS may levy your wages, bank accounts, or state tax refund for an unpaid balance.
- IRS LT11 — The IRS has not received payment for overdue taxes and intends to seize your property or rights to property.
- IRS CP90 — The IRS intends to levy (seize) certain assets to collect unpaid taxes.
- Find an accountant — for help responding.
Frequently asked questions
What is an IRS CP2000 notice?
The IRS is proposing changes to your tax return because income or payment information it received from third parties does not match what you reported. It is not a bill, but you may need to respond.
How long do I have to respond to a CP2000?
Reply by the date listed on the notice Check the date printed on your own notice, which is the one that applies to you.
What happens if I ignore a CP2000?
If you don't reply or the discrepancy can't be resolved, the IRS may send another notice and a bill.
What if I disagree with the CP2000?
Reply using the response form (or the method in the notice), state that you disagree, and include supporting documentation. Publication 5 explains appeal rights and how to prepare a protest.
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Authoritative sources
US tax rules change every filing season. Always verify the current position with the official sources below before filing.
- IRS — irs.govInternal Revenue Service. Forms, publications, due dates, and current-year thresholds for federal income tax, payroll tax, and 1099 reporting.
- IRS — Forms & InstructionsCanonical PDF forms (W-4, W-9, 1099-NEC, 1040-ES, 941, 940, W-2, W-3) with current-year instructions.
- SSA — Business Services OnlineSocial Security Administration portal for W-2 / W-3 e-filing, EIN verification, and AccuWage validation.
- Streamlined Sales Tax — streamlinedsalestax.orgMulti-state Streamlined Sales and Use Tax Agreement (SSUTA) — registration in 24 SST member states with one application.
- Tax Foundation — Sales Tax & NexusIndependent state-by-state research on sales tax rates, economic nexus thresholds, and franchise / margin tax structures.
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