Hello LeeLoving!
The claim of Michael the archangel as being Jesus, is a Mormon belief. Likewise, the JW's believe that Jesus is the spirit brother of Lucifer. Both are wrong. They believe in another Jesus and another gospel, which is no gospel at all.
Michael the archangel, though mighty, is a created being. No created being could pay the penalty for the sins of mankind. Only God alone who is Holy could do so. Furthermore, scripture states that all things, whether in heaven or on earth, were created by Jesus and for Him.
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The Son is the image of the invisible God, the firstborn over all creation.
16For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him.
17He is before all things, and in him all things hold together.
18And he is the head of the body, the church; he is the beginning and the firstborn from among the dead, so that in everything he might have the supremacy.
19For God was pleased to have all his fullness dwell in him,
20and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross.
And God the Father speaking about the Son, He says:
“In the beginning, O Lord, You laid the foundations of the earth, and the heavens are the work of Your hands.
They will perish, but You remain; they will all wear out like a garment. You will roll them up like a robe; like a garment
h they will be changed; but You remain the same, and Your years will never end.”