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 Managing Money as a Couple Keys to preparing to grow wealthy together. Understanding the Basics of Medigap Policies Important as it is, Medicare does not cover the full range of health-care expenses you may experience in your golden years. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.