Wills & living wills I am curious as to the filing procedures for wills and…

Wills & living wills
I am curious as to the filing procedures for wills and living wills. I have all the forms to do my own but do I have to file them with the state or do I just have them notarized and keep them someplace safe? Also, if I have a living will done what legal grounds would any one in my family have to dispute it