Does anyone know somebody who will give a 15 year old a tattoo in Texas?

No matter what state you live in, all safe, clean, and reputable tattoo parlors will require you to be eighteen before getting a tattoo, or have a parent come with you when you get your tattoo. If you get a tattoo from a non-reputable place, you run the risk of infection or the art being subpar. It's best - both aesthetically and medically - to wait to get a tattoo until you are eighteen.