Having your domicile state residency locked-in while you are in active duty service (NC in your case), is a huge help for most military people.
IF it wasn't, then every time you PCS'd to a new state, you might need to get a new Driver's license, car registration/plates, new voter's registration, file part-year taxes for both the former and new state...etc..etc.. what a mess that would be every time you PCS to a base in a different state.
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Now it is "possible" to reset your domicile state to a state other than NC for tax purposes, but first, you must be PCS'd to and based in that different state.....then you must change all your stuff (drivers license, car registration/plate, register to vote, etc), and then you must fill out a form DD-2058, and have it "accepted" by Military HR or Finance (not sure which)....then you likely will have to file part-year taxes for one or both states (depending on the new states tax rules) when the year ends and taxes are due.
But, with current rules, you are not required to change your claimed state of domicile with every PCS.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
