Section 1.55-1 - Alternative minimum taxable income(a)General rule for computing alternative minimum taxable income. Except as otherwise provided by statute, regulations, or other published guidance issued by the Commissioner, all Internal Revenue Code provisions that apply in determining the regular taxable income of a taxpayer also apply in determining the alternative minimum taxable income of the taxpayer.(b)Items based on adjusted gross income or modified adjusted gross income. In determining the alternative minimum taxable income of a taxpayer other than a corporation, all references to the taxpayer's adjusted gross income or modified adjusted gross income in determining the amount of items of income, exclusion, or deduction must be treated as references to the taxpayer's adjusted gross income or modified adjusted gross income as determined for regular tax purposes.(c)Effective date. These regulations are effective for taxable years beginning after December 31, 1993.T.D. 8569, 59 FR 60557, Nov. 25, 1994