!!!SOLVED - EUREKA!!!!!
After 2 hours of searching, I finally found my files in my ... (rolldrum) PC admin account. It seems like Turbotax software decided on it's own to move my tt24 files from C:\Users\*myusername*\Documents\TurboImpôt to C:\Users\*adminaccount*\Documents\TurboImpôt without any kind of warning.
The only thing I found was the shortcut to my original files in *recent files* pointing to C:\Users\*myusername*\Documents\TurboImpôt\2024\ but the folder was empty.
This is explaining why windows could not find them:
-searches done thru my user account can't see admin files
-windows file recovery showed no files, because no files were actually deleted, they were moved
-undelete thru recuva was unsuccessfull because the files were not deleted but moved
I have now setup a strong automated backup option (using mega.nz) to save all my files.
