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 A Fruitful Retirement: Social Security Benefit Taking your Social Security benefits at the right time may help maximize your benefit. Exploring the Federal Student Grant Program In this article, explore the benefits of the Federal Student Grant Program. Silver Sneakers 101 Medicare’s popular program, offering free gym membership and health education.