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 Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate. What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. How to Effectively Budget as a Couple Be sure that you agree on how to go about combining your finances as a couple before discussing how you'll handle expenses.