you don't need the 2024 program only the xxxx.tax2024 data file which should be on C:\users\user-name\documents\Turbotax folder. However, the 2024 program should install on W11 unless the computer you have operates in S mode which only allows for the installation of programs bought from the Microsoft Store. You would not be able to install Turbotax 2025. the workaround is to turn off S mode. It cannot be turned back on. if you don't have S Mode contact support for help.