(1) Passive activity losses (determined by taking into account the adjustments to AMTI and tax preferences) are not allowed in calculating AMTI.1
(2) Generally, in calculating AMTI, equipment must be depreciated using a 150 percent declining balance method switching to the straight-line method at a time to maximize the deduction over the regular recovery periods.
Property is assigned to various class lives in Revenue Procedure 882.2 These class lives can also be found in IRS Publication 946.