I am getting the same error when I try to e-file my amended 2021 taxes...
Ran into the same signature date problem as @dmcmtax reported... Ended up using the date that I e-Filed the original 2021 taxes - and maybe as the OP says, that is the problem that caused a validation error. In my error statement it says had problems with validation, and also TurboTax reports:
- E - File for this agency and filing type is no longer available. Please file any pending returns on paper.
SO, to echo @dmcmtax - is the problem the signature date? Or is the problem that it is too late to e-File 2021 amended taxes? Inquiring minds want to know... Am hoping there is a fix/workaround to get the taxes e-File'd... will save time, and $$s...
