Hello Myheart
Welcome to the son/daughter board.
You say that your adult child is raising havoc in your home and you want to ask him to leave, so his behaviour is obviously unacceptable to you and that is ok, you have a right to have some peace in your own home.
I haven’t had to ask an adult child of mine to leave but I do know that others who post here have. I think that it’s best to do it in a loving and supportive way without laying any blame, let him know that you love him and will always be there for him.
Does he have somewhere he can go when you ask him to leave?