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 Catch-Up Contributions Workers 50+ may make contributions to their qualified retirement plans above the limits imposed on younger workers. The A, B, C, & D of Medicare Learn about all the parts of Medicare with this informative and enjoyable article. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.