Did this for MANY years, while a Naval officer serving away from my "home of record". Your local Boards of Elections has the appropriate form. Be advised, however, that each state has its own laws re who qualifies for an absentee ballot. In all jurisdictions (I suspect) service members, the homebound ill/elderly, students away at college qualify. In some jurisdictions, however, one cannot get an absentee ballot simply for reasons of convenience.