I have a question about the law referring to children under the age? Refrences?

Okay well in the state of texas what age do you have to be to move out of your parents house legally? I heard you can do it at 17 with parent permission (like living alone. ur own apartment and all that) and they have to sign a couple papers. If someone could maybe link me to a page where i can research this- thatd be great!! Thank u sooo much for ur help:)