IRS Office of Chief Counsel IRSCC IRS-Büro des Chefjustiziars IRS Office of Chief Counsel Oficina del Consejero Principal del IRS Oficina del Consejero Principal del IRS Bureau du conseiller principal du IRS משרד היועץ הראשי של IRS आयकर विभाग के मुख्य सलाहकार का कार्यालय 米国内国歳入庁法務部 Escritório do Conselheiro-Chefe do IRS 美国国税局首席法律顾问办公室 IRSCC IRS Office of Chief Counsel As the chief legal advisor to the IRS Commissioner on all matters pertaining to the interpretation, administration and enforcement of the Internal Revenue Laws (as well as all other legal matters) the Chief Counsel provides legal guidance and interpretive advice to the IRS, Treasury and to taxpayers.