When you file an amended return using Form 1040-X, you’re asking the IRS to change something on a return you already submitted. Sometimes those changes reduce what you owe or increase your refund. But sometimes they go the other way — and when they do, the IRS sends a CP22A to confirm the change and request payment.
What the CP22A means
CP22A confirms that the IRS has processed your amended return and that the changes you submitted resulted in additional tax being owed. The balance shown reflects your own correction — not an IRS-initiated adjustment.
This is an important distinction. The CP22A isn’t the IRS telling you that you made a mistake on your original return. It’s the IRS confirming that the change you requested created a balance, and that balance is now formally assessed and due.
What to do
First, confirm that the balance matches what you expected when you filed the amendment. Occasionally the IRS processes an amendment differently than intended — particularly if the amendment involved complex calculations or multiple changes. If the amount looks right, pay it or arrange payment before the 21-day deadline to avoid additional interest.
If the balance doesn’t match what you expected, review your 1040-X against the CP22A line by line. If you find a discrepancy, contact the IRS with a written explanation and documentation of the intended changes.
Frequently asked questions
What if I filed the amendment by mistake? You can file another amendment to correct it. However, each amendment restarts certain review timelines, so it’s worth confirming the error before filing again.
Does interest apply from the original due date? Yes. Even though the amendment was filed later, interest on the resulting tax generally runs from the original due date of the return being amended.