Can't sign my name for deceased parent on TurboTax

Hello! I am done doing tax info including for 1310 for my father, putting myself as "beneficiary" included date of death and that I was doing this for a deceased person. However, from my understanding, I'm supposed to sign his tax return with my name and Turbo Tax does not let me complete the filling unless it matches my father's name. Is it okay to sign it as his name or was there something I did wrong while using TurboTax? Thank you!