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 Jane Bond: Scaling the Ladder Agent Jane Bond is on the case, uncovering the mystery of bond laddering. 9 Facts About Retirement Regardless of how you approach retirement, there are some things about it that might surprise you. When Do You Need a Will? When do you need a will? The answer is easy: Right Now.