"This is the way our Heavenly Father became God. Joseph Smith taught: “It is the first principle of the Gospel to know for a certainty the character of God. … He was once a man like us; … God himself, the Father of us all, dwelt on an earth, the same as Jesus Christ himself did” (Teachings of the Prophet Joseph Smith, pp. 345–46). "
This brings me to my next question.
When did Jesus become God? After his life, death and resurection?