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 Question Thank you! Oops! Related Content What is the Value of Your Business? Ascertaining the value of your business is important for a variety of reasons. Estate Strategies of the Rich and Famous The examples of famous celebrities underline the need for a clear estate strategy. Charitable Giving: Smart from the Heart Do you have causes that you want to support with donations?