How do I add my name to my Mom's house deed? Father's name is still on it who has been dead for 11 years. House is paid off she 74 and I live with her.

If she agrees, she would have a new deed made up adding your name, taking your fathers off.

I would use a real estate attorney or at least a title company.

Father's name is still on it who has been dead for 11 years.
Has your Dad's estate been probated/administered?

At the top of the Real Estate Law forum there is a sticky post that explains how to add someone to a deed. You can read it at https://www.askmehelpdesk.com/real-estate-law/how-add-someone-your-deed-91136.html