After you file

No.  If you start a 2019 online return in the same account it will transfer the personal data from 2018.  Then you can download the 2019 .tax file from online and just OPEN it in the Desktop program, go up to FILE-OPEN.  

 

Did you have problems with your son's SSA in the 2018 return?  Or just now doing 2019?  And are you using Windows or Mac Desktop CD program?