First restart the Mac. If the problem persists, then:
Corruption could have occurred in the Application or in an associated preference or support file.
The best remedy is to totally uninstall TurboTax and all associate files and then re-install. That will not delete or change any .tax2020 data file that had already been created with the tax data.
To uninstall the application and all associated files need to be deleted and then the application reinstalled. If there was a state then the state must also be reinstalled.
To remove TurboTax from your computer, you'll need administrative rights.
Here is a FAQ for how to uninstall Mac
https://ttlc.intuit.com/questions/1901210-remove-uninstall-turbotax-for-mac
There are no Turbotax items in the cache, preferences, cookies or webkit. I uninstalled TT and reinstalled it and it is doing the same thing.
Doing it again, I realized I skipped a step in the remove and install instructions
Have you resolved the issue with installing your software?