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 Life and Death of a Twenty Dollar Bill How long does a $20 bill last? Financial Aid for Students 101 Help your college-bound child explore scholarships, grants, and more with this article on paying for higher education. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan.