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 Do Our Biases Affect Our Financial Choices? Even the most seasoned investors have biases affecting their financial choices. Retirement Is a Beginning Key questions to answer when you are considering retirement. The Junk Drawer Approach to Investing It's easy to let investments accumulate like old receipts in a junk drawer.