Same issue. Technician Harry told me to Shut Turbotax2020 down and change my screen back to normal 1560. Then, reopen Turbotax and change the screen settings back to 800/600. The key box did display on my screen, but would not accept entry.
Harry said to enter the key underneath the box, press enter and then activate. Would you believe, I gained access to TT2020. Pain but really surprised TT hasn't put out a patch for this. A+ to Harry.
