I have been unsuccessful in getting TT to run under Big Sur 11.2.1. iMac 2017. Please read the various discussions on this site under Big Sur.
https://ttlc.intuit.com/community/forums/
and on the Apple site
https://discussions.apple.com/https://discussions.apple.com/community/mac_os/big-sur
regarding Big Sur. A few state they have had success and many have not had success.
https://ttlc.intuit.com/community/taxes/discussion/re-mac-os-big-sur-when-will-turbotax-run-under-th...
