Usually the age is 12 or 13. I'm not sure what Texas is. Look at your state's child support guidelines. Just because a child wants to live with the other parent, the judge doesn't have to let them. Call your child support office and ask or go here
There is no guarantee a judge will abide by the childs wishes at that age. You would have to file a motion for custody and hopefully the judge will take it into consideration, but the judge does not have to abide by that.
