"I selected the delayed submission (April 18th) option since I owed taxes."
There is no such thing ... so did you simply file an extension ? Did you make a payment with it ?
If you have not yet successfully efiled the original return then you must do so now ... remove the 1040X from the program so you can now file a correct return.
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:
- Open your return if it’s not already open.
- In the left menu select Cancel amend.
- Select Yes, I want to cancel my amended return.
