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 Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors. Retiring Wild: National Parks and You Get ready to enjoy America’s national park system with this helpful article. What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock.