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. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content Mortgages in Retirement Explore the benefits and drawbacks to paying off your mortgage prior to retirement with this article. RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two? A Brief History of Estate Taxes Federal estate taxes have long since been a lucrative source of funding for the federal government.