After you file

Well the downloaded program should have looked different than the Online version.  Did it have the menu items going across the top instead of down the left side like the Online version?

 

In the Desktop program  your return is saved as a data file ending in .tax2024.   You need that file to open in the program.  Then if you didn't save the pdf file you can open the .tax2024 file.   Also you will need the .tax2024 file to transfer into next year.  Either to the Online version or the Desktop program.  

 

But there can be a problem when saving  your return.  Do any of the other returns have the same name initial as you or your spouse? There is a problem saving returns if 2 returns use the same initials, one will overwrite the other. So you have to be sure to save the returns with names completely different to keep them apart. Don't use the default name given by the program. Go up to File-Save As and give it a unique name.