I had same problem with TurboTax 2021 on M1 MacBook Pro running MacOS Monterey V12.1 after Turbotax performed a standard check for updates, installed updates and relaunched the app. After trashing and reinstalling did not work, I followed Mauser_22 advice from 10/22/20 and also removed: ~Library/Caches/KSCrash/TurboTax. Then I reinstalled TurboTax 2021, and everything is working fine (so far)
