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 Split Annuity Strategy Here's one strategy that combines two different annuities to generate income and rebuild principal. Avoiding Cognitive Decline Try these activities to keep your brain sharp. Variable Universal Life Insurance Variable Universal Life is permanent insurance in which the policyholder directs how premiums are invested.