Final answer:
To compute Jack's 2018 income tax, use Form 1040, Schedule B, Form 8615, and the Tax Computation Worksheet from the Form 8615 instructions. Calculate Jack's adjusted gross income, determine his taxable income, and use the Tax Computation Worksheet to calculate his income tax.
Step-by-step explanation:
To compute Jack's 2018 income tax, you will need to use Form 1040, Schedule B, Form 8615, and the Tax Computation Worksheet from the Form 8615 instructions. First, you will need to calculate Jack's adjusted gross income, which includes his wages, interest income, and dividends. Then, you can determine his taxable income by subtracting his deductions and exemptions from his adjusted gross income. Finally, you can use the Tax Computation Worksheet to calculate his income tax based on his taxable income and filing status.