What is the tax identification of the trust?

The tax identification number of a revocable trust is always the Social Security number of the person who holds the power of revocation.

In this program that will be you, if you're an individual creating a single trust. It will be either Social Security number of a spouse if it's a married trust.

You do not need a separate tax ID number for a revocable trust as long as the people who created the trust are alive.