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 Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? A Look at Diversification Diversification is an investment principle designed to manage risk, but it can't prevent against a loss. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.