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 Insurance Needs Assessment: For Empty Nesters and Retirees Do your insurance needs stay the same when the nest empties? 9 Facts About Social Security There are things about Social Security that might surprise you. Problems with Probate Probate can be a completely public process, or it can be managed to include as little information as possible.