Thank you DaveF1006,
Worked like a charm. Turns out the laptop I installed it on didn't have a DVD player, but I found the original installation file in my download folder. In Windows 11, uninstall is found in Settings. Once uninstalled I ran the install file as an administrator and upon starting the program the updates took a while but completed successfully. I was a little concerned when TurboTax2020 closed after the update, but upon restarting it it appears to run as intended.
