@nuagesk8r
The title of this old thread sounds like it is from someone who said they had already sent their returns in the mail, so in that person's case it should not be efiled.
I'll assume you haven't actually mailed your return since you said "instead of mailing." You should only change the filing method if you have not actually physically filed anything by mail. If you have already physically mailed it, then do not efile.
This is an old thread from 3 years ago about 2016 returns. Several of the steps above are old and don't apply anymore. The website has been redesigned since then. This thread transferred in from the old forum last summer.
You mentioned an amendment form. If you started an amended return by mistake, you'll need to undo it, so it will revert to an original return and allow for the efile choice. If that's what happened, see this FAQ:
https://ttlc.intuit.com/community/amending/help/how-do-i-cancel-or-undo-an-amended-return-in-turbota...
Normally to get attention and help with your issue, you should start your own new thread so it shows up as unanswered and with your issue in the title. Below the title is a box for additional details if needed. You can use the "Ask a Question" button at the page below.
https://ttlc.intuit.com/community/taxes/discussion/02/202
You said you don't qualify for phone support. If you're using Free Edition, you can contact a Support agent directly via messaging at Twitter or Facebook for free.
https://twitter.com/TeamTurboTax
or
https://www.facebook.com/turbotax
