If you claimed the rebate credit in error—and it’s likely a lot of people did—disputing it is not going to do much good. You’ll still have to provide documentation to prove your eligibility.

If you believe your delay is the result of a math or clerical error, for now all you can do is wait to hear from the IRS. Be on the lookout for one of two notices: Notice CP11 or Notice CP12 ...

If you received a 6470 letter from the U.S. Internal Revenue Service in the mail regarding a "math error" in relation to your 2020 tax returns, you might owe more money on your next return. The ...

The IRS sent millions of “math error” notices during the first half of 2021, most of which involve federal stimulus payments.

But the IRS made a mistake and did not tell people in those letters they could appeal. That means a second letter had to be sent out telling people about their legal rights.