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 Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. When Special Care Is Needed: The Special Needs Trust A special needs trust helps care for a special needs child when you’re gone. When Do You Need a Will? When do you need a will? The answer is easy: Right Now.