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 Avoiding Cognitive Decline Try these activities to keep your brain sharp. Social Security: By the Numbers Here are five facts about Social Security that might surprise you. Helpful Retirement Strategies for Women Learn how to address the challenges that women face when planning for retirement.