Taxable income Form used to file one's income taxes. Tariff Income on which tax must be paid. Tax Return (1040) income on which tax must be paid (not earned income). Withholding Tax levied on foreign goods brought into the United States. Deductions Amounts that you can subtract from your income when filing taxes. Gift Tax Tax payments taken out of an employee's pay before he or she receives a paycheck. Estate Tax Tax on the total value of money and property of a person has