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. Related Content Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable. Where Is the Market Headed? We all know the stock market can be unpredictable. We all want to know, “What’s next for the financial markets?” The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are.