Ausmerican

Hi all, Not sure this is the correct area to post but it seems its the only spot I can post. My wife was born and raised in North Carolina and she went to NC State university for both her undergrads. We got married and travelled to Australia for 2 years to teach English. She was recently accepted back at NC state to do her master domicile has come into play. Is she still technically a resident of NC? All her official mail is sent to her mothers home in NC as it always has and we intend on moving back to NC permanently (in a different home, I'm not living with my mother-in-law).