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 How Stocks Work Understanding how a stock works is key to understanding your investments. Strategies for Managing Student Loan Debt Five strategies for managing your student debt. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement.