If you are on active duty (or you are an immediate family member of someone who is), Maryland gives you a motor-vehicle excise tax credit when you title a vehicle you brought from another state. New Maryland residents have one year. Returning Maryland residents have one year from the date they come home.
Title the vehicle at a Maryland Motor Vehicle Administration office within the window above. Bring proof of active-duty status (a military ID or equivalent). Ask MVA to apply the military excise tax credit on that title.
Proof of active military status (military ID or equivalent) and the out-of-state title or registration for the vehicle you are bringing in.