A simple probate-avoidance living trust has no effect on state or federal estate taxes.
Keep in mind that for deaths in 2012, only estates worth more than $5.12 million will owe federal estate tax. This means that very few people have to worry about this tax. (The exempt amount may go down in 2013, depending on what Congress does.)
In the past, AB trusts were used to help couples save on estate taxes. However, the large personal exemption and "portability" for spouses make AB trusts largely unnecessary. To learn more, read Nolo's article Tax-Saving AB Trusts.
Get Started with Quicken WillMaker Plus!
Everything you need to create a complete estate plan:
Write a legally valid will
Avoid probate with Nolo's Living Trust
Create a health care directive
Create a durable power of attorney
Prepare executor documents
Save on attorneys fees
Estate Planning Basics
Do-It-Yourself Estate Planning
Wills: Your Last Will & Testament
How to Avoid Probate
Living Wills & Medical Powers of Attorney
Living Trusts
Estate, Gift & Inheritance Taxes
Estates, Executors & Probate Court
Getting Your Affairs in Order