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 Good Health is Good Business Good employee health can be great for the company’s bottom line. Charitable Giving: Smart from the Heart Do you have causes that you want to support with donations? Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan.