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 Choose Your Own Retirement Adventure Retirement is one of the greatest adventures you’ll have. Which retirement adventure will you choose? The Average American Budget Learn about the average American budget in this fun and interactive piece. When Life Insurance Becomes Taxable Life insurance proceeds are generally tax-free. But not in all cases.