Yes....delete the W-2 form you entered with no box 1 $$.
Edit the full one with NC already on it, and add a new line for boxes 15-thru -17. You'll see a blue text underneath the one already there to "Add Another Row".
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Normally, when working for a single employer, all the separate states are enters on the same software W-2 form. The only reason they give you separate state sheets is ...just in case you mail-file the states, you have state w-2 forms in-hand to send in along with each state's forms.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*