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. Four Reasons Millennials Need an Estate Strategy Estate strategies for millennials may sound like less of a concern than retirement, but young adults should prepare now. How the Federal Reserve Works Each day, the Fed is behind the scenes supporting the economy and providing services to the U.S. financial system.