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 Question Thank you! Oops! Related Content Immediate vs. Deferred Annuities Looking forward to retirement? It's critical to understand the difference between immediate and deferred annuities. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. How to Get Your Finances Ready for Retirement Everyone has a vision of their retirement in their heads.