I know of no inherent issues with 2019 and Catalina.
I would recommend a *total* uninstall that includes the preference and support files that could be corrupt.
The best remedy is to totally uninstall TurboTax and all associate files and then re-install. That will not delete or change any .tax2019 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.
Restart the Mac before reinstalling.
Here is a FAQ for how to uninstall Mac
https://ttlc.intuit.com/questions/1901210-remove-uninstall-turbotax-for-mac
https://ttlc.intuit.com/questions/1901209-reinstall-turbotax-mac
=================
If the above has already been done then I have seen several cases where there is corruption in the Mac User account. That can be proven (or eliminated) by switching user accounts to another account that is an administrator account (If no such account, it is easy to create one using System Preferences -> Users & Groups).
If TurboTax successfully installs and runs under a different User Account then repairing the first User account is something that you should refer to Apple support.
**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.**
