After you file

For the online program ... 

Step 1 :  

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:

1. Open your return if it’s not already open.
2. In the left menu select Cancel amend.
3. Select Yes, I want to cancel my amended return.

Step 2 :  UNDO all the changes you made.