W11 is required for any of Turbotax's 2025 apps, including desktop individual. Copy the 2024 file (not the PDF so you still have a copy on the W10 computer) to a thumb drive or maybe even email it to yourself (this won't work if the file is too large). On the W11 computer download from e-mail or if you used a thumb drive copy or cut and paste it to your W11 desktop. Just makes it easier to find. When you start the 2025 you may have to browse to the desktop for the app to see the 2024 file. There may be other methods available to transfer the file, but this depends on your specific setup and what you are able to do.
