Articles · Basics · IRS Compliance, Penalties, and Ethics
How to Respond to an IRS CP2000 Notice
A CP2000 notice tells a taxpayer that income or payments reported to the IRS do not match the return. It is a proposal, not an audit and not a final bill.
Why it arrives
The IRS matches Forms W-2 and 1099 against returns. A mismatch can come from omitted income, but also from a missing cost basis, a duplicate form, or an incorrect information return.
How to review it
Compare the notice line by line with the return and source documents. Check whether the income was reported elsewhere on the return. For stock sales, the IRS may have proceeds without basis, which overstates the gain.
Respond by the date on the notice, which is typically within 30 days. An extension may be possible on request.
Your response options
If the taxpayer agrees, they sign the response form and pay or arrange a payment plan. If they disagree, they send a signed explanation and supporting documents. Generally, an amended return is not needed if they agree, unless other items need changing.
Ignoring the notice usually leads to a statutory notice of deficiency, which starts a 90-day period to petition the Tax Court. Penalties may also be proposed, and a taxpayer can ask for relief where there is reasonable cause.
Key takeaways
- A CP2000 is a proposal, not a bill.
- Check for basis and duplicate reporting.
- Always respond by the deadline.
For general education only, not tax advice. Tax law changes often, so confirm current rules and amounts with primary sources.