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 Good Health is Good Business Good employee health can be great for the company’s bottom line. Pay Yourself First It sounds simple, but paying yourself first can really pay off. Countdown to College Preparing for college means setting goals, staying focused, and tackling a few key milestones along the way.