If you used the download version of TurboTax (TT), that is, you currently have TT 2023 on your computer, make a copy of your 2023 return (click file / save as). Name it something like "2024 Preliminary" and then replace your 2023 entries with your 20224 estimates. It won't be exact because the program uses 2023 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 online TT, because you will override your 2023 return.
