Mark and Patricia reported adjusted gross income of $410,000 in itemized deductions of $31,000 for the interest on their home acquisition mortgage (principal amount of $890,000 acquired in 2015), $14,000 in state and local taxes, and $38,000 in charitable contributions. They file a joint tax return and have four dependent children under age 16. What is their taxable income for 2018 and allowable tax credits?