You cannot install 2 versions of 2020 TurboTax on the same computer - it is not permitted since many support files are the same.
The first version must be TOTALLY uninstalled along with ALL support files.
Here is a FAQ for how to uninstall Mac
https://ttlc.intuit.com/questions/1901210-remove-uninstall-turbotax-for-mac
Also if present remove: ~Library/Caches/KSCrash/TurboTax
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
