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 Global and International Funds Investors seeking world investments can choose between global and international funds. What's the difference? When Special Care Is Needed: The Special Needs Trust A special needs trust helps care for a special needs child when you’re gone. Please Leave Home Without It Concerns over identity theft continue to grow, especially with data breaches at major companies and financial institutions.