Tax Adjustment Act of 1966. : Hearings, Eighty-ninth Congress, second session, on H.R. 12752, an act to provide for graduated withholding of income tax from wages, to require declarations of estimated tax with respect to self-employment income, to accelerate current payments of estimated income tax by corporations, to postpone certain excise tax rate reductions, and for other purposes. February 25, 28, and March 1, 1966.