Many thanks for your response. I did as you suggested but was unsuccessful. Here's a little more background. I just purchased a new Dell desktop and also purchased Dell Migrate. I did not find out until recently that Migrate only transfers data, no apps so none of my Turbotax transferred. I had used PCmover in the past and contacted them and they suggested that I try PCmover as it would not transfer anything that had already been transferred. It worked and all of my Turbotax apps and files transferred. I can open previous years of Turbotax on the new computer with no trouble. It's only 2020 that gets hung up on a blank activation screen. I also uninstalled Turbotax 2020 and reinstalled it both from the CD and also from a download with no luck. I can still open 2020 on my old desktop. Does this help in any way? Unrelated side note: PCmover is head and shoulders above Migrate for transferring data and apps and user settings from old to new.
