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 Protecting Your Business from the Loss of a Key Person Business owners may be able to protect themselves from the financial consequences of losing a key employee. Bridging the Confidence Gap In the world of finance, the effects of the "confidence gap" can be especially apparent. Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic.