Tax
CP2000 Notice
An IRS underreporter notice proposing additional tax when the third-party income data the IRS holds (W-2, 1099, K-1) does not match what you reported on your return.
A CP2000 is not a bill and is not the start of an audit. It is a proposal issued by the IRS's Automated Underreporter (AUR) program when the third-party information return data (W-2 from employers, 1099 from brokers and banks, K-1 from pass-throughs) does not reconcile against what your return actually reported. The response window is 30 days from the notice date, and the notice includes a proposed tax, penalty, and interest figure the IRS will assess if you do not respond.
The response is not a form; it is a written reply. You can agree in full (sign the response form, pay or make payment arrangements), agree in part (mark the items you accept, dispute the rest with substantiation), or disagree entirely (write a substantive response and attach the evidence). A frequent scenario is that the AUR match caught a real omission on one line (missed 1099 for a side gig) while double-counting income already reported elsewhere; a partial-agree response is often the right posture.
Ignoring the CP2000 leads to a CP2501 or a Statutory Notice of Deficiency (SNOD), which is your last chance to petition Tax Court before the assessment posts. Once assessed, the balance moves into the automated collection pipeline (CP14, CP504, LT11) and options narrow at each step.
Rubric Financial's IRS representation practice, led by Nitasha Ahuja, EA, reads the CP2000, pulls the wage-and-income transcript to see exactly what the IRS's data says, and files the response inside the deadline.
Common pitfalls
- Treating the CP2000 as a bill and paying without responding; you often owe less than proposed once real deductions and offsetting items are documented
- Missing the 30-day window; the case then moves to CP2501 or Statutory Notice of Deficiency and options compress
- Responding without pulling the wage-and-income transcript first; you cannot correct a mismatch you have not seen from the IRS's side
- Assuming the AUR data is right; the IRS routinely posts K-1s twice or misapplies broker cost-basis, and a good response documents that
Related service
See the related serviceHave a CP2000 Notice situation in your business?
Federal, state, and local returns prepared and reviewed by a licensed CPA, with the planning done before year-end rather than after it.