Incorrect return entry
The estimated tax line may include a payment that was not made or may use an incorrect total.
IRS Notice CP24 • Credit or Refund Change
Received an IRS CP24 notice?
CP24 says the estimated tax payments claimed on your return do not match the amounts posted to your IRS account. The correction may create a credit or change the refund.
Review the refund before spending it. If the notice lists a payment you did not make or a refund you are not entitled to, contact the IRS using the notice instructions.
There is no fee to book the call. No documents are required when booking. Have the complete CP24 available during your call.
Sonya D. Bright, EA
Baytown-Based
Virtual Nationwide Service
What CP24 Means
The IRS changed the return to match its payment records
CP24 is issued when estimated payment amounts reported on the return differ from credits posted to the account and the adjustment creates a credit or changes the refund.
The difference may come from an incorrect return entry, a missing or misapplied payment, or a prior-year refund that was not credited as expected.
Why The Records Differ
Common causes of a CP24 mismatch
Payment was not credited
A payment may be missing, applied to the wrong year, posted under the wrong payment type, or associated with the other spouse on a joint return.
Estimated payment mismatch
The estimated payments claimed on the return may not match the amounts posted to the IRS account.
Extension payment issue
A payment made with an extension may be missing, delayed, or applied incorrectly.
Prior-year credit elect
A refund elected to the next year may have been reduced, offset, or posted differently than expected.
Joint-return identification
A payment made using the second-listed spouse’s information may require research before it is moved to the joint account.
What To Do
Choose the path that matches the facts
If the IRS record is correct
No response is required. Correct the retained copy of the return, but do not send that copy to the IRS.
If a payment is missing
Do not automatically pay twice. Locate the confirmation, canceled check, or bank record. Confirm the tax year, payment type, and taxpayer information used.
If the prior-year credit is wrong
Compare the prior return, refund amount, election to apply the refund forward, and any offsets or adjustments affecting that credit.
Documents To Review
Have these available for the call
- Every page of the CP24 notice
- The filed return for the tax year shown
- IRS payment confirmations
- Cancelled checks or bank statements showing payment
- Extension and estimated-payment records
- Prior-year return and refund credit election
- IRS account transcripts for both years
- Earlier notices involving the same tax year
- Recent IRS account transcript, if already available
Mistakes To Avoid
Do not make the account harder to correct
Missing the response date
Respond promptly if you disagree. Use the exact date and instructions printed on CP24.
Spending an incorrect refund
If the notice lists a payment you did not make, contact the IRS before using the related refund.
Using the wrong tax year
A payment applied to the wrong year may distort both the CP24 year and another tax period.
Amending without a reason
A CP24 does not automatically mean an amended return is required. First identify why the IRS account differs.
Assuming every refund change is correct
Compare the notice with the return and actual payment records before accepting the adjustment.
Sending sensitive records casually
Do not send tax records or identification through ordinary email or text.
Frequently Asked Questions
IRS CP24 questions
Does CP24 mean I am being audited?
No. CP24 is a processing adjustment involving payment credits. It does not itself begin an examination.
What if the payment was made under my spouse?
Payments connected with a joint return can sometimes require research when they were submitted using the second-listed spouse’s information. Verify whose information was used and preserve the payment confirmation.
When should the remaining refund arrive?
The IRS says the remaining refund should generally arrive within four to six weeks if no other taxes or collectible debts are owed.
Can TaxDecoders represent me?
Representation may be offered under a separate written engagement after the issue, deadline, account history, and required work are reviewed.
Is there a fee to book?
No. There is no fee to book the call. No documents are collected during booking.
What if the notice lists a payment I did not make?
Contact the IRS using the number on CP24. Have the return and supporting records ready. An erroneous refund may need to be returned.
Verified Resources
Official IRS information
This page was reviewed on July 28, 2026. Always follow the instructions and dates printed on your actual notice.
Understanding CP24
Estimated tax guidance
Returning an incorrect refund
Received CP24 and cannot reconcile the refund change?
Book a call with TaxDecoders. Have the complete notice, current and prior-year returns, and payment records available during the call.
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