After you file

I used premire to file 2019 taxes.  I opened up turbo tax 2019 to make adjustments for 2021.  Turbo tax wanted to up date the program so I Marked yes.  It asked me to restart program for updates to be activated.  I did.  I opened up 2019 return and it required a license number. I fund this and entered the 10 symbols.  Upon opening the 2019 program, it only opened up the amended return that I prepared the day before.  No other federal or state return is available.  I check on 2018 return and it opened up but no values were shown.  I opened up 2017 return and this opened up that return with all info shown.  

I saved the 2019 returns on the PDF file and the are still there.  Is there a method for moving these into the turbo tax format in case I have to make changes for an audit or any other change?