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 Traditional vs. Roth IRA One or the other? Perhaps both traditional and Roth IRAs can play a part in your retirement plans. The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route. Investing with Your Heart For some, the social impact of investing is just as important as the return, perhaps more important.