Response to the following problem:
Jack Bennett is married but does not file a joint return with his spouse. He is 36 years of age and has excellent vision. Jack and his wife share custody of their 10-year-old son. They have lived in separate households since May 2014. Jack is not the custodial parent, but his wife has signed Form 8332, allowing Jack to claim their son as a dependent. Jack's AGI is $63,440 (all from wages) and he uses the standard deduction. His employer withheld $8,000 for federal income taxes during the year. Compute Jack's 2014 taxable income and taxes owed (to be refunded).