Revenue-The amount of money generated through sales

progressive taxes- a tax that imposes a lower tax rate on low-income earners compared to those with a higher income, making it based on the taxpayer's ability to pay

proportional taxes- an income tax system where the same percentage of tax is levied on all taxpayers, regardless of their income.

regressive taxes- Taxation that takes a larger percentage of a lower-income and a smaller percentage of a higher income.

standard deduction- the portion of income that is not subject to tax that can be used to reduce your tax bill

tax brackets- a range of incomes taxed at a given rate

exemption- a deduction allowed by law to reduce the amount of income that would otherwise be taxed

tax evasion- the illegal nonpayment or underpayment of tax

tax avoidance- the arrangement of one's financial affairs to minimize tax liability within the law

itemize- allow taxpayers to take out more from their taxable income than they could by using the standard deduction

correspondence audit- tax audit that the Internal Revenue Service (IRS) performs via mail

adjusted gross income-  a measure of income calculated from your gross income and used to determine how much of your income is taxable

child support- court-ordered payments, typically made by a noncustodial divorced parent, to support one's minor child or children

alimony- a husband's or wife's court-ordered provision for a spouse after separation or divorce

deductions- any item or expenditure subtracted from gross income to reduce the amount of income subject to income tax

Taxable Income- refers to the base upon which an income tax system imposes tax