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 The Cycle of Investing Understanding the cycle of investing may help you avoid easy pitfalls. How to Retire Early Retiring early sounds like a dream come true, but it’s important to take a look at the cold, hard facts. Countering Counterfeit Currency Combating counterfeiting remains core to preserving the integrity of the nation’s money.