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CP2000, explained

Your income does not match.

Updated October 8, 2026Fact checked
How urgentHigh

Your income does not match.

The short answer

A CP2000 says income or payment records from others don't match your return. It is not a bill, but you may need to reply by the date on the notice. The change could raise, lower or not change your tax. Reply on time.

Key facts

  • It is not a bill.
  • It is based on records from employers, banks and others.
  • The change can raise, lower or not change your tax.
  • If you don't reply, the IRS may send another notice and a bill.

What to do next

  • Read the whole notice.
  • Fill out the reply form, say if you agree, and add proof.
  • Have more to report? File Form 1040-X with CP2000 written on top.

Check your balance in your own IRS online account, and use the phone number on the notice or on irs.gov.

Results depend on your situation. Not every case qualifies.

Common questions

What is a CP2000 notice?

A CP2000 says income or payment records from others don't match your return. It is not a bill, but you may need to reply by the date on the notice. The change could raise, lower or not change your tax. Reply on time.

How urgent is a CP2000?

High. Act by the date on the notice so it does not move up the ladder. The date on your notice is the one that counts.

Run the numbers with our free tax tools, like the penalty and payment plan math.

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