Hello.
If you want to sing a song which you have made up, or any song for that matter, do you have to identify each note of the song and "adjust" your voice so u make sure ur singing every single note?
what im trying to say is, do u have to be able to sing every note of the scale then listen to the song and think "right so thats a C", sing a C, "ok next, its a E", sing and E?, and go through the song like that.
do u really have to go through a song like that? or can u simply sing it without making sure ur actualy singing every single note as it should be?

I'm not quite sure I understand the question but here’s a stab at it
You don't need to know the names of the notes to sing a song. Most songs are often transposed so what one singer or recording has as say EFGC might equally be A Bb C F etc.
It is in theory quite possible to write as song which doesn't solely use notes “of the scale”, though this probably becomes less likely if the composer has listen to a lot of western music – and most of us have by a very early age.
But no, letter note names describe pitches in music- the notes, sounds themselves, are the music.