“Hello, I live in Dallas TX, and I recently turned 18 years old. I am going to be a senior in high school next year. So my question is: if I move in with a relative other than my parents (let’s say an uncle), do I have to enroll myself in school or can I get that relative to enroll me? I’m asking this because I know that even though I’m 18, I’ll be living under someone else’s roof. So I don’t know if that makes me a dependant still or if I’m on my own just because I don’t live with my parents.”
Because you are 18 – legally an adult – in many states you can handle all of these things yourself. What you should do is call the school district’s office, and ask them this question. I’m sure they will be happy to hear from such a thoughtful, mature student.