If the return was never filed you do not amend. Just fix it and efile it or print and mail it. Did they start the amending process?
How to cancel or undo an Amended return
https://ttlc.intuit.com/community/amending/help/how-do-i-cancel-or-undo-an-amended-return-in-turbota...
Then to get back into a return do not click on Amend. Click on Add A State to let you back in.
