You are not looking for a previous version of the TurboTax software. You are looking for a previous version of your 2023 tax return.
TurboTax Online saves only the most recent version of your tax return. Once you make changes, there is no way to get the previous version back.
The instructions in the FAQ that DoninGA referred you to will remove the Form 1040-X, but they will not undo the changes that you made. You have to undo the changes yourself to get the tax return back to the way it was when you filed it. Step 6 in the FAQ tells you that you have to undo the changes yourself.
