Individual Income Tax Computation and Tax Credits PROBLEMS Select problems are available in Connect. 47. Whitney received $75,000 of taxable income in 2018. All of the income was sal ary from her employer. What is her income tax liability in each of the following alter tive situations? a) She files under the single filing status. b) She files a joint tax return with her spouse. Together their taxable income is $75,000. c) She is married but files a separate tax return. Her taxable income is $75,000 d) She files as a head of household