Where do I look for a mistake when TurboTax is indicating I don't owe taxes for North Carolina even though I (NR) was filing because I had gambling winnings (W2-G)?

I'm a Non resident.  I've been through the wizard several times, but cannot determine why it indicates I owe $0.  I've had to file in prior years for other W2-Gs and it's usually ~100 owed.