I am making a mod that rquires you to finish a focus and you will become independent and i was wondering how to do that because it doesn't seem like i can do that.

Assuming you want to play as Egypt (tag EGY)

release = EGY
EGY = { change_tag_from = ROOT }

I dont think you understood i meant playing as (for example) South Africa as a Colony of Britain and to then not become a puppet and be free from Britain.

Ah, then what you would need to do is:

set_autonomy = {

    target = SAF

    autonomy_state = autonomy_free

}

Thanks, i think i was just stupid cause now when i serached up autonomy it came up with what i needed.