It is a strange problem. Here are the steps that I took to install TurboTax 2019 & 2020 on a new laptop windows 10:
1- Change screen / display resolution to 800 x 600
2- Turn off any windows defender and virus protection programs, then Start TTax
3- When it gets to the screen that asks for license code, it pops a small window that becomes visible only when I changed the display resolution to 800 x 600 (while I was inside the TurboTax program) to enter the code, but no matter what I tried, this window remained grayed out......I ignored that and entered the license code anyway (you just cannot see what you are entering), then pressed "Enter key", then after a few minutes I had to start TurboTAX again. This time I was able to get into TTAX program. I had several other problems after that which dealt with downloading my State Return program. For that, I had to create a dummy tax return, go through the state return process, then come back and delete the dummy file so that I can finally get back to my original 2019 & 2020 tax returns. Turbotax has had this issue in the past, but I do not understand why this has not been resolved yet.
Good luck
