IRS Notice CP23: Estimated payments don't match: you owe
IRS Notice CP23 is a return adjustment letter from the IRS. The estimated tax payments on your return don't match what the IRS has on record, so it corrected the return and you owe a balance. The IRS sends letters like this after it changes figures on a return.
What this letter usually means
The estimated tax payments on your return don't match what the IRS has on record, so it corrected the return and you owe a balance. A change can raise or lower what you owe or your refund. The letter shows both the old and new figures.
Category: The IRS changed your return
What people usually do first
If you agree, pay by the date on your notice. If you disagree, call the number on your notice by that date.
What to have ready
- The letter, every page
- Your copy of the return
- Records of your estimated payments
- Your bank or card statements for those payments
What may come next
This letter does not point to a specific follow-up letter. Any later step will be described in mail from the IRS.
Read the IRS page
The IRS letter itself is the final word on what it means for you. Read the IRS page for CP23.
Common questions about CP23
What is IRS notice CP23?
The estimated tax payments on your return don't match what the IRS has on record, so it corrected the return and you owe a balance.
How long do I have to respond to a CP23 notice?
The date to respond or pay by, if there is one, is printed on your letter. Check it, and read the IRS page for CP23 for more.
Is a CP23 notice a scam?
A real CP23 comes by mail and should match your own records. You can also sign in to your IRS Online Account on irs.gov to see your account directly.
What should I have ready for a CP23 notice?
The letter, every page, Your copy of the return, Records of your estimated payments, Your bank or card statements for those payments.
The OweRight app explains the CP23 letter type in plain English.
Get early access to the appOweRight is not the IRS and does not give tax or legal advice.
Related notices
- IRS Notice CP22A: Changes you requested: you owe
- IRS Notice CP60: Payment removed from your account
- IRS Notice CP21A: Changes you asked for: you owe
- IRS Notice CP21C: Changes you asked for: balance is zero
- IRS Notice CP22I: Changes to your return for IRA taxes
- IRS Notice CP24: Estimated payments don't match: refund changed