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. Six Surprising Facts About Retirement Confidence This attention-grabbing infographic covers retirement topics you may not have considered. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy.