Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement. Social Security: By the Numbers Here are five facts about Social Security that might surprise you. Does Your Credit Score Affect Your Insurance Rates? Your credit score may influence how much you pay for auto and home insurance.