Which adjustment is classified as a deferral item under the Alternative Minimum Tax (AMT)?

The adjustment classified as a deferral item under the Alternative Minimum Tax (AMT) is depreciation. Under AMT rules, certain forms of depreciation, particularly the difference between regular tax depreciation and the depreciation allowed under AMT, are treated differently. This can create a temporary deferral of tax liability, as the adjustment for AMT may result in a higher income figure than what is reported for regular tax purposes due to accelerated depreciation methods that can be used for regular tax but are limited under AMT calculations.

In contrast, the standard deduction is not applicable under AMT, as AMT calculations do not permit a standard deduction. Itemized deductions, while subject to adjustments under AMT, do not function as deferral items in the same way that depreciation does; they can lead to immediate alterations in taxable income rather than delaying tax liability. Lastly, tax-exempt interest is treated differently in AMT calculations but does not constitute a deferral item either, as it does not create the type of temporary tax obligation changes seen with depreciation adjustments.