Get your taxes done using TurboTax
You're not trying to 'Open' the .tax2023 file; it will only open in the TurboTax 2023 program.
You want to 'transfer' it into your 2024 program.
If you choose File > Start a new Return > Find a Tax File, the file should pop up in a window, where you can highlight it, then choose the Open link at the bottom of that window.
If that is not what you see, if you could post more details, or share a screenshot, we'll try to help.
Here's more info on Transferring a Prior Year Return.
