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 Exploring the Federal Student Grant Program In this article, explore the benefits of the Federal Student Grant Program. Impact of Taxes and Inflation Estimate the potential impact taxes and inflation can have on the purchasing power of an investment. Retirement Plan Choices for Small Businesses Retirement choices can be intimidating. Picking the right strategy.