@jaelitouz before I attempt to answer your question , let us make sure that I understand your situation. I know FEIE ( Foreign Earned Income Exclusion) but have no idea what you mean by SOFA nor TESA. Could you please elucidate ? Which country are you planning to stay and work in ? Are you US Person ( Citizen / Green Card holder ) and if you are not a citizen of USA then which country's passport do you hold?