Do you have the Desktop program installed? You can download the .tax2023 file from Online and open it in the Desktop program. The save it with another name to test in. That’s what I do. You can test in the copy and there is a What-If worksheet you can use.
To continue in the desktop version see this…….
https://ttlc.intuit.com/community/choosing-a-product/help/how-do-i-switch-from-turbotax-online-to-th...
Download the .tax2023 file for free
How do I save my TurboTax Online return as a tax data file?
After you get the program installed the first thing to do before you open your tax return .tax file is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to F.ILE - NEW). Just enter some basic personal info like your name and address then click on the State tab at the top and it should ask if you want to download the state program.
