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 How Stocks Work Understanding how a stock works is key to understanding your investments. Problems with Probate Probate can be a completely public process, or it can be managed to include as little information as possible. Life and Death of a Twenty Dollar Bill How long does a $20 bill last?