Principles of Preserving Wealth The slideshow presentation that you would like to view is too large for your current screen resolution. Click here to view to view the slideshow at full resolution. Launch Presentation » Share | Related Content Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Insurance Needs Assessment: For Empty Nesters and Retirees Do your insurance needs stay the same when the nest empties? What Is My Current Net Worth? Use this calculator to estimate your net worth by adding up your assets and subtracting your liabilities.