If you did not save a PDF of the return before you started the amended return then you will need to undo the amendment and remove any changes so you can save the return as filed. Before you start look at the 1040X ... is column A the same as originally filed then look at column B to see what sections were changed so you know what was corrected.
How do I cancel or undo an amended return in TurboTax Online?
If you started amending your tax return by accident and would like to cancel the amendment:
If you started amending your federal return by accident and would like to cancel the amendment, follow this process to correctly "unamend" your federal return:
State Amendments
The best way to "unamend" your state return is to go through your state return from the beginning and keep your eyes peeled for amend-related screens or questions.
The amend question usually appears right at the beginning or towards the end of the state interview (never in the middle).
Correct any entries that have to do with an amended return, e.g.:
If you still can't get rid of your state amendment form, try clearing your state return and starting over.
TurboTax Online saves only the most recent version of your tax return. It does not retain previous versions. When you amended your return, the amended version was saved and replaced the original version. If you did not save a copy of the original version on your own computer before you amended it, there is no way to get the original version from TurboTax.
The instructions that Critter-3 gave you will let you reconstruct your original return in TurboTax, but it depends to a large extent on your knowledge of what you changed. Column B of the 1040-X will show you the changes in the total amounts, but not the specific changes that you made. The explanation of the changes that you provided in Part III of the 1040-X should help you remember what you changed.
Caution: Save a complete copy of your amended return before you start trying to undo it. Once you cancel the 1040-X, it will be gone, with no way to retrieve it. As I said above, TurboTax Online saves only the most recent version of your tax return. The reconstruction, or attempted reconstruction, of the original return will replace the amended return.
Your accountant, with your permission, can get a transcript of your original tax return from the IRS. This would be a lot easier than trying to reconstruct your original return yourself, and would eliminate the possibility of errors in the reconstruction.