If NC tax was withheld from either of the Form 1099-R payments, then you might want to file a NC non-resident return to get a refund of taxes withheld - it will depend on how much tax was withheld and whether you want a refund.
You were a resident of SC for the entire year, so none of your retirement income was taxable by NC.
Effective for retirement income received after December 31, 1995, federal law prohibits any state from taxing certain retirement income (mainly pension income) unless you are resident of, or domiciled in, that state.