This worked for me today!
After I installed 2020 version and added the license code, it worked fine.
Then some time later, I plugged in a USB drive while TurboTax was running, no error either. It run fine next day as well.
Then this morning I need to e-file the return, TurboTax asked for license code again.
I called customer support, stayed with them for 20 minutes waiting for a solution. While waiting, I found this post and removed the USB drive, and it worked. I told TurboTax support, they have no idea of this bug!
Why the hell license code is tied with external drive!
