You or your spouse lists a Utah address on mail, a telephone listing, a listing in an official government publication, other correspondence, or similar item. You must file a Utah TC-40 return if you: 1.Are a Utah resident or part-year resident who must file a federal return,. 2. Your domicile is the location of your permanent home. I've been Googling but can't find an answer to my question of how to establish a domicile address in Utah for voting as a fulltime RVer. A key factor for Utah being one of the largest captive domiciles in the United States is the quality and accessibility of its captive regulatory staff. If you own a vehicle, you must show a current Utah vehicle registration when you file your Utah residency application.