New Windows 11 machine had same problem. Using factory installed intel graphics adapter with latest updates installed.
Resetting scaling allowed screen to show but it could not be updated. Went to 800x600 resolution with same result. Closed and reopened TT and got blank screen. I noticed cursor would change as I moved around on the screen so I guessed where the input field would be and entered the code in the blind, then clicked lower right corner. Characters did not show up, but (surprisingly) the software activated!
I have had no issues on any other applications, and TT seems to be working fine once I got past the activation screen. I consider this a Turbotax issue that you folks need to resolve.
