Columbia subject headings:
Income tax--United States.
Taxation--United States.
Harvard subject headings:
Income tax--Law and legislation--United States.
Income tax--United States.
Tax administration and procedure--United States.
Tax shelters--Law and legislation--United States.
Taxation--Law and legislation--United States
Value-added tax--Law and legislation--United States.
Princeton subject headings:
Income tax--United States.
Tax administration and procedure--United States.
Tax shelters--Law and legislation--United States.