My opinion is this is not a simple answer. Apparently many 17 yr olds in TX ask this question.
If you leave now, they can call the police to report a missing child... However you are not technically a "missing child" if your parents or guardians know of your location. Thus, if you keep them informed of your location, the police should not retrieve you and bring you back home, but you should check with the law enforcement in your area to be sure.
Best advice is to wait until you are 18, unless there is some serious reason that you want to leave. (abuse - in which case, notify law enforcement). Here is a further (complicated and confusing explanation):
Under Code of Criminal Procedure, you are NOT a "missing child" if parents know where you are.
Under Juvenile Justice Code, you are a child if you are alleged or found to have engaged in conduct "indicating a need for supervision" (this includes RUNNING AWAY).
"Running away" is defined as: voluntary absence of child from the home without parental consent for substantial time or without intent to return.
Under Texas Penal Code, "Harboring a runaway child" is a crime. It is a defense if the person "harboring" you notifies law enforcement or parents within 24 hours of discovering you ran away.
You can also petition for emancipation, but it's an ordeal.
BEST ANSWER I got....I hope I was HELPFUL!