I amended my 2018 tax form and found out later that I didn't need to.

[ssarfati]

I need the copy that was electronically submitted, not the amended one. How do I get it?

The amended copy has overwritten the originally e-filed one in the system, it seems.

EDIT: Found it. It is located under My Docs, rather than under previous years' tax returns.

[Critter]

Yes ... that is what happens when you amend ... so if you do not need the amendment you can undo it ...click "Cancel Amendment" on the left side of your screen.  

[ssarfati]

Unfortunately, cancel is not on there.

I found it, though, thanks. It's under My Docs in the original format.

[Critter]

To cancel the amendment so the incorrect info doesn't transfer to next year you must OPEN the return to cancel ... log in and scroll down to click on ADD A STATE to open a closed return.