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 Data Thieves from Outer Space Learn about the dangers of internet fraud with this highly educational and fun “pulp” comic. Eight Mistakes That Can Upend Your Retirement There are common mistakes you can avoid when saving for retirement. Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill.