Section 164(b)(6), as added by the 2017 Tax Cuts and Jobs Act, provides that deductions for foreign real property taxes are not allowable under section 164(a)(1) and limits an individual’s deduction to $10,000 ($5,000 in the case of a married individual filing a separate return) for the aggregate amount of the following state and local taxes paid during the calendar year: (1) real property taxes; (2) personal property taxes; (3) income, war profits, and excess profits taxes; and (4) general sales taxes. This limitation applies to taxable years beginning after December 31, 2017, and before January 1, 2026, and does not apply to foreign taxes described in section 164(a)(3) or to any taxes described in section 164(a)(1) and (2) that are paid or incurred in carrying on a trade or business or an activity described in section 212.