1) you cannot pay NC with your e-file...not allowed. Only the Feds allow that.
2) First.... e-file and wait a couple days for your acceptance notice.
THEN
3) ... pay with the tax payment voucher and a paper check by mail
...OR
4) log onto the NC payment website and arrange a Direct Debit..or CrdtCd payment of your balance due.
http://www.dornc.com/electronic/d400v.html