Did you ask NC about your refund? Or how do you know it wasn't filed? They could be late sending the refund. It might take awhile. Did you efile or mail it? If you efiled was it Accepted? When you efile you get back 2 emails. The first email only confirms the transmission. The second email says if the IRS (or state) Accepted or Rejected your efile.
When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc. What does it say?
By the way, how did you send the estimated payment? Did you include it in the tax due check or send it separately? They should have gone in separate envelopes.
