I am also having the same issue.
I have used TurboTax as a download to my Mac for 2019 and 2020. Last year, despite having the filing on my computer, I was unable to import any data (and we have 7 kids) from the previous year. Now, same thing is happening. I open TT2021 and it cannot find any TT files.
It's super frustrating because you would think a program would be able to locate its own file type? I will try saving...but I too have a .pdf saved. It does not bring up any .tax files automatically.
I've read what people have written to help OP and will try the same.
