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 Message Thank you! Oops! Related Content Net Unrealized Appreciation (NUA) Explained Have you considered the special tax treatment on company stock held in a 401(k) plan? How Insurance Deductibles Work Knowing how insurance deductibles work can help you save money and give you peace of mind. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.