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Deductions & credits
If you are stating that you believe that the IRS adjusted your interest deduction correctly then pay any amount due and that will end the matter.
If you are stating that you used the correct loan limit of $750,000 on the original return then you should contact the IRS at the address on your CP28A notice and tell them that you feel the calculation is correct. Be sure to indicate the mortgage origination date as well as a copy of the 1098 that you originally received.
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‎January 12, 2026
10:16 AM