After you file

@russells85 

Slow down and stop trying to amend.  You do not amend a return that was never filed in the first place.  If your 2017 return was not filed and accepted it was not ever filed.  That means do not click on anything that says amend.  Amending is a process you only use to make changes/corrections to a tax return that has been fully processed.  You say it was not.

I clicked on “amend” by mistake

https://ttlc.intuit.com/questions/2552802-how-do-i-cancel-or-undo-an-amended-return-in-turbotax-onli...

What you need to do is print, sign and mail your 2017 return now.  If it was rejected you would have received an email telling you that it was rejected; perhaps you missed noticing that email or it might have gone to your spam folder.   Or maybe you just did not go all the way through the FILE section and e-file it.  E-filing is permanently closed for 2017 returns so it must now be mailed.

 Online preparation and e-filing for 2017 is permanently closed.  You have to download 2017 software to a full PC or Mac (not to a mobile device) and then print, sign and mail your return.  If you already paid for your TurboTax software, you can contact customer support to push a download of the software to you.

To call TurboTax customer support

https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number

They are available from 5 a.m. to 5 p.m. Pacific time.

To finish a prior year return started in TT online:https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS and/or your state received the return

Once you successfully complete and file the 2017 return, you should be able to transfer the 2017 data to a 2018 return.  Be aware that you can only transfer the 2017 return at the very beginning of the 2018 tax return preparation.  When you file 2018, you will not be able to use the 2017 AGI to e-file 2018, since you are filing 2017 late, and it will not be in the system.  So use "zero" for your 2017 AGI.  If that does not work, then you will have to print, sign and mail 2018.