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 Dreaming Up an Active Retirement When you retire, how will you treat your next chapter? Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan.