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 16 Wall Street Cliches in 60 Seconds Pundits say a lot of things about the markets. Let's see if you can keep up. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy. The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does.