What year are you amending? 2018 online? You can delete the amended return and start it over.
You can delete the amended return this way. Do the steps slowly and carefully. After you delete it then you need to manually take out the changes you made to put your return back to the original return.
How to delete an Amended return in the Online version
https://ttlc.intuit.com/community/amending/help/how-do-i-cancel-or-undo-an-amended-return-in-turbota...
