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 9 Facts About Retirement Regardless of how you approach retirement, there are some things about it that might surprise you. Four Reasons Millennials Need an Estate Strategy Estate strategies for millennials may sound like less of a concern than retirement, but young adults should prepare now. Global vs. International: What’s the Difference? International funds invest in non-U.S. markets, while global funds may invest in U.S. stocks alongside non-U.S. stocks.