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 Why Medicare Should Be Part of Your Retirement Strategy How Medicare can address health care needs in your retirement strategy. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Breaking Down the Parts of Medicare Medicare is broken down into four specific parts—but what do they mean? This article will help you understand each piece.