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 Where Is the Market Headed? We all know the stock market can be unpredictable. We all want to know, “What’s next for the financial markets?” The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route. Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate.