Cadets and mids learn all about the strategies for this as junior officers. They can be military non-residents in a state, while on AD orders, and hence not subject to income tax there. Each state also has various rules on drivers’ licenses. It’s not unusual for an AD person to have HOR in one state, legal residence in another, a driver’s license from a past duty station and a car with plates from the immediate last duty station. Always let the law enforcement officer who has stopped you see both your driver’s license and military ID, so they immediately grasp why nothing seems to match up.