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 Suddenly Single: 3 Steps to Take Now Have you found yourself suddenly single? Here are 3 steps to take right now. Please Leave Home Without It Concerns over identity theft continue to grow, especially with data breaches at major companies and financial institutions. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money.