Those are the MAIN NC tax forms.
You cannot e-file NC until after 26 January....go thru the NC interview on 27 Jan, and try again on the 27th.
(But you are already paying extra for LIVE....ask your agent if it isn't clear.)
Form D-400 is the individual income tax form used for North Carolina state individual income taxes.
If this does not answer your question, please clarify what additional information you need or what you are seeing in TurboTax that makes you ask.