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 From Boats to Brokers From the Dutch East India Company to Wall Street, the stock market has a long and storied history. Inflation & Your Money It's important to understand how inflation is reported and how it can affect investments. Choosing a Retirement Plan that Fits Your Business To choose a plan, it’s important to ask yourself four key questions.