Hello TurboTax person,

I made a mistake in filing my 2021 return using TurboTax. I entered US Treasury interest income on the TurboTax 1099-INT page in box 1 ("Interest income") rather than in Box 3 ("Savings bonds and treasury interest"). After filing my return, I corrected the mistake and filed both Federal and State amended returns using TurboTax. I received the state refunds in the spring of this year (2022), but received a letter from the IRS telling me that on my federal return "The information provided on 1099-INT does not support the entry made on your form 1040-X."

Of course, these forms are generated by TurboTax, and I had no such problem with my amended state return. Is, or was, there a known bug in the federal amended return process that has caused my amended return to be rejected by the IRS?