NO. You may not charge your dependent minor child rent. You cannot allocate "fair market rental value" as part of his support - in fact, you cannot designate ANY of his money as going toward housing, because you don't have a house payment.Do you mean that part of my child's SS benefit payments can be allocated as fair rental value of the home on paper (representative payee report)?
You may not do what you propose to do. It is FRAUD, and is a great way to lose your child's benefits for him.