What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Stay Safe with a B.O.P. At Your Back Learn about the advantages of Business Owner Policies with this highly educational and fun animated video. What's New for Social Security? There have been a number of changes to Social Security that may affect you, especially if you are nearing retirement. Understanding the Alternate Valuation Date Executors can value the estate on the date of death, or on its six-month anniversary —the “Alternate Valuation Date."