If your first original return was rejected then it wasn't filed. You do not amend. Just fix it and resend it. Go through the File tab again. But you might need to undo or delete the amended return you started.
How to delete an Amended return in the Desktop program,
https://ttlc.intuit.com/community/amending/help/how-do-i-cancel-or-undo-an-amended-return-in-the-tur...
