Thank you for the reply! I think the only thing I did was clicking into a question regarding amendment but I didn't do anything there. Also, the smart check only sometimes asked me to fix the error, not always. In addition, when I checked my Schedule X after following the instruction from the smart check (enter amount in line 1), the amount I entered in line 1 of Schedule X sometimes disappears. This inconsistent behavior looks to me really like a bug. I used TurboTax Premier version on Mac.
Is it ok to attach Schedule X without amendment?
