Hello,
First and foremost, it is important to realize that amendments generally take a very long time to process. They can sometimes take longer than 16 weeks. Based on the information you provided, I see two options. The first option is to continue waiting and checking the status as you have been doing. The second option is opting to give both the IRS and NC a phone call and speak to a live agent who can check on the realtime status of the return.
For Individual returns filed with the IRS, you can call 800-829-1040. There is currently a trick to get to a live human being and get passed the automated system.
1. Select English
2. From the automated menu, select Option for Billing and Payments (Currently option 2)
3. After Billing and Payments, let the automated menu replay a few times but don't select anything.
4. They will transfer you to a live agent after a few replays.
As for NC, you can refer to the following page for applicable phone numbers:
https://www.ncdor.gov/contact-ncdor
For further reference of IRS contact points, please see:
https://www.irs.gov/help/telephone-assistance
Best regards!
