Tax Computation Problem- Chapter 6 Tax Computation Problem 57John and Mary Jane Diaz are married, filing jointly. Their address is 204 Shoe Lane, Blacksburg, VA 24061. John is age 35, and Mary Jane is age 30. They are expecting their first child in early 2018. John’s salary in 2017 was $105,000, from which $20,800 of Federal income tax and $4,700 of state income tax were withheld. Mary Jane made $52,000 and had $3,000 of Federal income tax and $3,100 of state income tax withheld. The appropriate amounts of FICA tax and Medicare tax were withheld for John and for Mary Jane. John’s Social Security number is 111-11-1111, and Mary Jane’s Social Security number is 123-45-6789.