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Responding to an IRS CP2000 Notice

A CP2000 is an automated underreporter inquiry from the IRS. Third-party income the IRS received (W-2s, 1099s) doesn't match what you filed. You have 30 days to respond.

Herman Viglione, EA
Written by
Herman Viglione, EA
Updated April 22, 2026
30-day response window

IRS notices have short response windows. Call the office today if your deadline is close.

What the IRS is asking for

The CP2000 includes a proposed amount of additional tax, plus interest and an accuracy-related penalty (usually 20%). You can agree, partially agree, or disagree. Ignoring the notice leads to a Notice of Deficiency and automatic assessment.

What to do in the next 30 days

Verify each proposed change against your records. Respond in writing with documentation for disputed items, signed Form 9465 or installment agreement request for agreed amounts you can't pay in full, and a request for Appeals if you disagree and don't resolve at the examination level.

  • Don't panic, these notices are common and often wrong
  • Don't check the box agreeing to everything without reading each line
  • Gather the missing 1099 or document the why the IRS is mistaken
  • Respond in writing, keep a copy of everything sent
  • If you agree with some items and not others, pay what you owe to stop interest
Have a specific situation?
Call the office and a human answers.

Common questions

What if the CP2000 is wrong?
Respond with documentation. Maybe the income was already on your return under a different line, maybe it was a corrected 1099 you never received, maybe the IRS misread a form. We dispute wrong notices regularly.
Can I get more time?
Yes. Call the number on the notice and request a 30-day extension before the deadline. Most are granted.

Related

A Conversation, Not A Form

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