I’ve filed and set up to send the return by mail but I would like to change that to e-file. I’m unable to change the status of a amended return but I haven’t amended my return yet.

If it thinks you Amended you can delete the amended 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-turbotax-online/00/26315

If you haven't mailed it yet you can try to switch to efile.

Click on Add a State to let you back into your retun.

How to change from Mail to Efile

https://ttlc.intuit.com/community/e-file/help/how-do-i-change-from-mail-to-e-file-in-turbotax-online/00/26985