Deductions & credits

Thank you. The sentence indicates that the “owner” can’t increase the basis, for tax purposes, by more than the difference between the original investment and the tax credit taken.  But do you know where the Internal Revenue Code explicitly states that only the owner can claim the tax credit? The word owner seems to be purposely avoided. 

 

Actually who is the “owner” in the case of a mortgaged home? For example the buyer may have paid 20% but the mortgage holder has paid %80.