After you file

Hi - I am concerned that I have "registered", because this is my 7th year submitting taxes on behalf of my father with TurboTax. This year has been different because I typically e-file, but this year, I have to mail the return because my father died this year.  As I progressed through the filing late last night, I think I was a little distracted and thought I could go back and check something (SSA contributions), and that it would not file the return, but the status of the return for 2019 says "filed". I'm not sure how this is possible if I have to mail it along with a Form 1310 this year. Not sure what I need to do as I have to make a correction.