I am only changing filing status, MFS to MFJ, so there aren't any new forms. I am taking your ((and everyone else's (including TT's)) advice and will mail only the 1040X + Schedule B to the IRS and IT-201X to NY State. That is, if I can't e-file either on Jan 26, when the IRS and NYSDF start accepting e-filed returns and TT says their software will be magically fixed and I will be able to e-file 🤣.
