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 Rightsizing for Retirement What does your home really cost? Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. The History of Currency Currency has been around for a long time. Here’s a quick history lesson.