For tax year 2022, desktop TurboTax (CD/download) requires MacOS BigSur 11 or higher to install. (Catalina 10.15 is not supported.)
For more 2022 system requirements, see the announcement at the link below.
NOTE: The first half of the page is for the Windows version, so scroll down to the Mac requirements.
https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements
