I've had similar problems with TurboTax Deluxe 2021. I haven't called tech support but I've rebooted and tried repair to no avail. Notice error message 2803 window during install process but installation continued with apparent success. When I tried to start to use the program, an activation window opened for me to enter the license code but the window was blank. I kept clicking in the lower right corner where a finger pointer appeared and the empty window appeared with text and a box for me to enter the license code. I could not enter the license code in the box in that window. I've never had a problem with a TurboTax installation after many years of use. I'm getting ready to return the CD to Costco and to buy a different tax program and to give up on TurboTax.
