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 Encore Careers: Push Your Boundaries Ready for retirement? Find out why many are considering encore careers and push your boundaries into something more, here. A House Divided By understanding a few key concepts during a divorce, you may be able to avoid common pitfalls. Exploring the Federal Student Grant Program In this article, explore the benefits of the Federal Student Grant Program.