The tag below your question indicates that you are using the desktop TurboTax software (Home & Business in Windows). If that's correct, hopefully you saved a copy of the return with a different name before you started amending it, or you have a backup copy of the return that you actually filed.
If you don't have a copy of the .tax2024 file for the original return, go to forms mode and delete the Form 1040-X. But that will not undo the changes that you made. You will have to go back and manually change everything back to the way it was when you filed. Before you start this process, save a backup copy of the return as it is now, in case you make a mistake and have to start over.
