The Tax Cuts and Jobs Act of 2017 repealed the shared responsibility payment, which is a penalty for not having minimum essential health coverage (and not being exempt from this requirement). But the repeal doesn’t impact 2018; it only provides relief after 2018.
A statutory method of depreciation allowing accelerated rates for most types of property used in business and income-producing activities during the years 1981 through 1986. It has been superseded by the modified accelerated cost recovery system (MACRS) for assets placed in service after 1986.