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 Your Emergency Fund: How Much Is Enough? Having an emergency fund may help alleviate the stress and worry associated with a financial crisis. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important. How to Make the Tax Code Work for You When you take the time to learn more about how it works, you may be able to put the tax code to work for you.