Should I talk with a tax attorney?

This is going to depend on the terms of the trust, whether the house was distributed to you before the sale vs the sale proceeds being distributed to you, and the timing of the sale. Trust taxation can be fairly complicated and it varies greatly on the facts of the situation. It wouldn't hurt to talk to a tax attorney about this to make sure you're reporting it right. An estate planning attorney who also does tax might be best. A CPA could do this, but not all CPAs handle trust taxation regularly so you have to be sure that they have some knowledge on the subject.

It's going to depend on a few factors and will have to have some more information. You should have received a basis in the property equal to the fair market value at the time the decedent passed away. If that was recent, then there shouldn't be much gain if at all on the property.

If the house is sold at the same value that it had at the date of death, then the answer is "no." By all means talk to a competent CPA, e.g., Steve Enrico who is in Santa Barbara.