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 How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions. 4 Elements of an Estate Strategy Learn about the importance of having an estate strategy in this helpful and informative video.