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. Related Content My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. Retiree Health Care Coverage Overseas Retirees traveling abroad need to know that their health insurance travels with them. Intellectual Property Rocks in a New Digital Era Intellectual property ownership and its implications for ordinary people and estates.