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 Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. Investing for Impact Learn how to build a socially conscious investment portfolio and invest in your beliefs. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.