First, I need to correct the link that I posted earlier, it should have been for North Carolina.
http://moraloutrage.net/staticpages/...=Northcarolina
I don't know what reason your parents are telling you that you are still under their authority. You have legally reached the age of majority.
If she makes a report with the police, I'm sure they will inform her that you are an adult and they can't do anything about it.§ 48A-2. Age of minors.
A minor is any person who has not reached the age of 18 years.

