Only thing I did was go back to the beginning to make sure my selection for the Economic Impact Payment was corrected. Gave myself a heartache because the “oops!” error started appearing again. I did just try to let the screen sit if it went blank instead of hitting any kind of refresh.
Another difference I noticed was actually being able to save the PDFs of my return by navigating to “Print Center” on the left under Tax Tools. That hadn’t worked before. My plan was to mail the hard copies if the site kept crashing. Are you able to do that at least? Mine was like 700 pages
