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 | Related Content Do You Feel Lucky? Recent changes in estate tax laws could affect the strategy you have in place. Why You Need an Estate Strategy Do you have an estate strategy? You should. Principles of Preserving Wealth How federal estate taxes work, plus estate management documents and tactics.