Have you seen the FAQ for Transferring? How are you trying to Transfer 2024? Do you have a password set on your 2024 data file?
How to Transfer into the Mac Desktop program
https://ttlc.intuit.com/turbotax-support/en-us/help-article/data-systems/transfer-last-year-return-2...
Here's an idea. Open the 2024 program and your 2024 return. Go to FILE - OPEN. And see if that is the right one. In the 2024 program do a File-Save AS or Duplicate and give it a easy name you can find or search for. Take off a password if you had one. And note where it saves it or select where to save it so you can find it again. The file will end in .tax2024. Then close the 2024 program. Then start a new 2025 return and transfer from the 2024 file.
