Philadelphia, PAFederal excise tax auditor at U.S. Treasury Depart... I am a Federal excise tax auditor, currently employed by the U.S. Department of Treasury. I work out of the Alcohol and Tobacco Tax and Trade Bureau's (TTB's)... I am a Federal excise tax auditor, currently employed by the U.S. Department of Treasury. I work out of the Alcohol and Tobacco Tax and Trade Bureau's (TTB's) field office in Philadelphia, PA.