Can a 18 yr old do online school without parent permission?

Ill be 18 right around when school starts again n I wanna do online school for my senior year. I just not sure my mom would let me cus I switched schools alot through out hign school. I switched twice this year. I'm just not happy in classrooms it gives me anxitey I just really dislike other teenaers so much. So if im 18 can I just do online classes no questions asked?