Thank you to those who responded. Apparently I did not describe my situation well enough, but I finally figured out the solution.
Using MarilynG1's screenshot above, when I clicked on the .2023tax file (with the icon) there was no response, and when I navigated to the Turbotax folder I clicked on the .2023tax file and the Open button was grayed out.
I found that the Turbotax folder was in my Documents directory in the (onedrive) cloud, and TT won't import from a file in the cloud. That sounds like an unnecessary limitation, but it is what it is.
When I copied the .2023tax file out of cloud-based Turbotaxed folder and into a new directory I created on my hard drive, I could import from it.
Problem solved. Yay me! (and again, thanks to those who responded).
