Section 12 1 of income tax act July 8, 2019 16 32 64 128 Section 12 1 )( b of income tax act Section 12 1 )( ac of income tax act Section 12 1 )( b )( ii of income tax act Section 199a qualified business income deduction Section 199a explained Section 179 Section 179 tax code explained Tax act 1065
