A CP2000 notice proposes changes because information from an employer, bank or other payer does not match your tax return. It is not a bill or a final decision. Read every page, note the response date and compare the listed items before deciding whether to agree.
Start with the notice and the filed return
Check the taxpayer name, tax year, notice number and response deadline. Use a complete copy of the return actually filed, including schedules. A draft return or the following year's documents can make a correct item look missing. If you cannot find the return, obtain the relevant IRS transcript and your preparer's copy.
Make one line for each proposed change: payer, form, amount the IRS received, amount already reported and explanation. A stock sale reported without its cost basis, a duplicate payment form or income listed under a different schedule can require different responses.
Choose the response that fits the facts
| Your finding | Next action |
|---|---|
| All proposed changes are correct; nothing else changes | Follow the notice's agreement instructions. An amended return is generally unnecessary. |
| Some or all information is incorrect | Explain each disputed item and include supporting copies. |
| The proposal is correct but other income, credits or expenses also change | Review the IRS instructions for submitting Form 1040-X with the CP2000 response. |
| You cannot finish by the deadline | Request more time using a reply option in the notice; do not assume approval. |
Use the response form when provided and sign where required. Send the reply through an option listed on the notice or verified IRS page. Keep a copy and proof of submission. Do not send original records unless specifically requested.
Build a response packet
- Every page of the notice and its envelope, if available.
- Filed return, relevant schedules and original or corrected W-2 and 1099 forms.
- Broker statements, platform reconciliations or other evidence for each disputed item.
- A short explanation cross-referenced to those documents.
- Copies of previous replies and submission confirmations.
Do not file a separate amended return merely to make the notice disappear. It may not resolve the notice and can complicate processing. If tax is genuinely owed, discuss payment separately from the response; interest may continue. Also check whether a federal adjustment affects California, rather than assuming the IRS response updates the state return.
CP2000 questions
Is CP2000 an audit?
It is a proposed information-matching adjustment. Follow its specific response procedure; do not treat it as a final bill or ignore it because it is not a traditional examination.
Should I agree just because the IRS has a 1099?
No. Compare the payer's information with the return and supporting records. The amount reported by a third party may be incorrect, duplicated or missing relevant basis.
What happens if I do not respond?
The IRS may send another notice and a bill if the discrepancy is unresolved. Preserve the response date even while requesting documents or professional help.
Can someone respond for me?
The notice includes authorization options, and Form 2848 may be appropriate for eligible representation. Confirm the person's authority and the scope of assistance before relying on them.
Official sources
Sources checked October 19, 2026. General information; application depends on the tax year and your circumstances.
Your next step
Call to discuss your situation and confirm the documents needed. (323) 364-5589