Section 168 irs July 8, 2019 16 32 64 128 Section 168 irs code Section 168 irs code computers Section 168 k irs Section 168 e )( 6 irs Irs section 168 f )( 1 Irs section 168 k )( 7 Irs section 168 property Irs section 168 g Section 179 tax code explained Irs section 168(e) Irs section 168(h)