If you used the download (desktop)version of TurboTax (TT), that is, you currently have TT 2024 on your computer, make a copy of your 2024 return (click file / save as). Name it something like "2025 Preliminary" and then replace your 2024 entries with your 2025 estimates. It won't be exact because the program uses 2024 tables and numbers. But, it should be close enough for most purposes. I use the override feature to change the standard deduction and MAGI numbers, on the forms, where appropriate.
This doesn’t work with TT online (TTO), because you will override your 2024 return.
