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 Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. Choosing a Business Structure Entrepreneurs all face the same question, “Which business structure should I adopt?” Pullbacks, Corrections, and Bear Markets When the market experiences volatility, it may be a good time to review these common terms.