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 Four Reasons Millennials Need an Estate Strategy Estate strategies for millennials may sound like less of a concern than retirement, but young adults should prepare now. The Great Debate Continues: Active vs. Passive In investments, one great debate asks the question, “Active or Passive Investing: Which Is Better?” What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.