What file did you download from Online? Was it the pdf file or the data file ending in .tax2024? You should be able to open a pdf file. If you have the .tax2024 file you need the 2024 program installed to open it. Which I suspect you have since you used the Desktop program before and want to go back.
If you’re trying to open the .tax2024 file…….After you get the program installed or 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 Tax Return).
Then go to FILE -Open and find your return.
Hope this helps
