Where does God live or dwell? In heaven right? But where is heaven located? It depends on which one you are talking about. Biblically speaking, there are 3 different heavens referred to in the Bible.
Heaven 1- one use of the word heaven means “sky.” Birds fly in this heaven.
Heaven 2- this is considered outer space (where the moon lives)
Heaven 3- this is considered the dwelling place of God & the angels, etc.
I guess most people are probably talking about heaven #3. Where does it exist? Nobody here can tell you yet.
But consider how vast the universe is. There are things we will never know about it (think about the black holes, distant galaxies, black energy/matter, possible alternate dimensions and all those other things.
So it could be anywhere, and what I know for sure is that no one here can tell you! We will all find out in good time.