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 Question Thank you! Oops! Related Content Lifetime of Earnings Estimate how much you have the potential to earn during your working years. A Penny Saved is Two Pennies Earned Here are some simple and inexpensive energy-saving tips that may help you save money. Inventorying Your Possessions Creating an inventory of your possessions can save you time, money and aggravation in the event you someday suffer losses.