Nonresidents and part-year residents of North Carolina prorate their taxable income. This is done by calculating the ratio of their total North Carolina-sourced income to their total income from all sources. See line 24 of Form D-400 Schedule PN.
This pro-rated amount is carried over to line 13 of Form D-400, resulting in an amount of North Carolina taxable income on line 14 that would be a fraction of your federal taxable income.
It's quite possible that, after this proration and other deductions on Form D-400, your North Carolina taxable income could be zero, resulting in a complete refund of all of your North Carolina W-2G withholding.
That said, you're encouraged to review all of your entries.
