Personal income tax: mortgage interest deduction.

The Personal Income Tax Law allows various deductions in computing the income that is subject to the taxes imposed by that law, including, in modified conformity with federal income tax laws, a deduction for a limited amount of interest paid on acquisition indebtedness, as defined, with respect to a qualified residence of the taxpayer. Existing law limits the aggregate amount treated as acquisition indebtedness for these purposes to $1,000,000, or $500,000 in the case of a married individual filing a separate return. Existing law specifies for these purposes that a qualified residence includes the taxpayer's principal residence and one other residence selected by the taxpayer, as provided.