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 Should I Accept a Free Credit Lock? Learn the ins and outs of credit locks, freezes, and more. Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? Interested in a Fuel Efficient Car? Estimate how many months it may take to recover the out-of-pocket costs when buying a more efficient vehicle.