@ lastly wrote:
and when I try to download my .tax file, so that I can try to amend using turbotax desktop, it's NOT the original .tax file, but the one already modified by the botched online amend...
so how do I access the original .tax file, corresponding to my filed return?
Unfortunately, there is only one *.tax2020 data file, and there is no function to automatically get back to an original *.tax2020 data file "as filed." Ideally, it should have been saved to your computer first as a backup prior to starting the amended return. After cancelling an amended return, any changes to restore it to original would have to be done manually. In my other comment I told you how to find the "Delete a form" link that you were seeking, if you added forms/worksheets you don't need. However, if a form/worksheet regenerates after deleting it, then in some circumstances you might have to go through the interview for the topic for the form.
