To update my post (had completed all tax prep, filed federal and then had TT crash after filing one state (with more needed to file): What finally worked was 1) creating a new user with admin privileges (not sure where I read to do that) 2) putting my completed TT return files in a shared folder that I my "new user" could access 3) downloading TT to the "new user" . Then because I had tried to run TT as the "new user" and it still wouldn't open, I followed the summary of Sbed650 (who credited jwhaskell1 and audge66)" 4) from Finder use GO tab at top then GO To Folder ~/library then PREFERENCES then delete the file named "com.intuit.turbotax.2020.plist" and 5) launch TT2020 but disregard Intuit's error message (i.e. close the box without sending Intuit a crash report!).
It seems to work now so long as I log onto the new user (now named "Turbotaxworkaround"). This is the first time I have had any trouble with TT -- but the biggest irony of it all is that when I finally went back to the state returns that needed filing and started the process, I learned that because I didn't have a driver's license from that state nor filed returns there before, I had to mail the return in anyways!
There was 5 hours of my life I'll never get back.
