Thank you. That seems to be correct from my experience thus far. Amendments to 2021 were e-filable from the Online version prior to the April 15 midnight deadline. I am happy to mail this amendment at this point anyway, I just need to figure out if I need to wait for communication from the IRS, or to figure out what caused the rejection so I can fix it, if anybody understands what TurboTax meant in their email by this:
/Return/ReturnHeader/FilingSecurityInformation/TotalPreparationSubmissionTs - Data in the return is missing or invalid. Please double check your entries.
Thank you all.
