Thanks, Critter C and VolvoGirl (and any others who replied). I actually uninstalled the external CD/DVD drive, plugged it into a different USB port, checked to see if it was working (first, by trying out a music CD) and that it had updated drivers, and then made sure the Turbotax CD was seated properly and snapped into place, and this time it worked and I could install it on my new PC. So I now have Turbotax Deluxe 2021 on my new Dell PC and could use it to open my 2021 tax files. When I have more time, I will try installing the last few years of Turbotax, too, in case I ever need to go back to older tax files. I really appreciate your taking the time to respond to my dilemma. After getting the latest advice from you all (and in case the external CD/DVD drive stops working again or dies), I will try to copy the Turbotax CD onto a flash/thumb drive. There might even be an internal or external CD drive on my new office desktop computer (which I haven't used yet, since I've been working remotely for a long time) but if it doesn't, I can find someone else who does have one. Meanwhile, I'm sorry to have taken up your time, but do appreciate the help. And now I don't have to try to call Turbotax again!
