What was the status on your original return? You only amend if the first return was accepted and fully processed. Amended returns are on a 1040X forms and can only be mailed by you. If you didn't mail the 1040X then it didn't go anywhere.
How to amend a 2019 online return. See step 5
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577
