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If I already entered my mortgage interest as a deduction, do I need to re-enter it in the AMT adjustment section?

Maybe. Many of the deductions you can claim on a regular return you can't deduct for the Alternative Minimum Tax (AMT). So, you must add back these deductions to your income.

In the regular tax system, you can deduct almost all mortgage interest. However, for AMT, you can only deduct the part of the mortgage you use for your first or second home when you:

  • Buy it
  • Build it
  • Substantially improve it

Otherwise, you’ll need to add back deductions claimed for mortgage interest under AMT rules.


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