I'm not going to tell my parents I might move
Why don't you want to tell them about a possible move?
I don't like to be told what to do.
I can see that you'd want to keep a move secret if you think your parents will interfere. It's good to be honest with your parents, but you have the right to move if it makes sense to you.
I'm going to move and tell them after the fact.
They're your parents so they should know what you're doing in your life. It's ok to make decisions for yourself but it's good to be honest and upfront about them. It wouldn't hurt.