TurboTax Online saves only the most recent version of your tax return. All changes are saved automatically and permanently. There is no undo or backout. If you did not save a copy of your filed tax return before you made changes, there is no way to retrieve it from TurboTax.
You will eventually be able to get a copy of the tax return that you filed from the IRS, but if they have not finished processing it, that would probably not be available yet. See the following link on the IRS web site for instructions to get a transcript or a copy of your tax return from the IRS.
Topic No. 156, How to Get a Transcript or Copy of Your Tax Return