And if you used the Desktop program you need to have the data files ending in .tax2020, .tax2019 etc. to open in the program. Did you make backups from the first computer? You need the file ending in .tax2019 to transfer into 2020.
After you get the program reinstalled the first thing to do before you open your tax return is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW).
