The Internal Revenue Code (United States Code, Title 26) contains the statutes dealing with income, estate, gift, excise and employment taxes. The first IRC was passed in 1939 with subsequent revisions in 1954 and 1986.
Location: 5 East / stacks 23-24
The U.S.C. is the official compilation, published by the Government Printing Office. Editions are published every six years with annual supplements.
Location: Reference KF 6276.526 A19 I57
West publishes hardbound volumes of the IRC annually, including amendments and statutory notes, which makes this a good set for legislative history research.