Although a revocable living trust This is the document which you will be preparing to avoid estate taxes and probate. It has possession of your property, and a system for caring for the property, both before and after your death. is a separate entity, a federal tax identification number is not required for income tax purposes. The social security number of the Grantor This is the person that puts his/her property into the trust to avoid estate taxes and probate. is the tax number of the trust and must be given to banks, corporations and others who pay interest or dividend income to the trust.