I originally removed TurboTax by just dragging the application into the trash. I think that the problem occurred due to some corruption in the library files that the article showed how to remove. Unfortunately, the keystrokes in the article did not match my OS exactly.
I installed TurboTax in a much newer Macbook Air running 11.7.3 Big Sur which never had TurboTax installed before. It works just fine. Of course, there were no residual files in the library to cause the problem.
Thanks for you help! I'm good to go.
