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 Question 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. How to Appeal Your Property Taxes For homeowners who think their property taxes are too high, there are ways to appeal. Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors.