Co-owner property or self proerty

sales of agreement complete by wife and himself.Loan obtained by jointly from bank . Payment of bank or builders by himself and loan amount paid by me and TDS also deducted by me . Registration also in the name of wife and himself. After registration it is co-owner property. Loan and interest payment liable for deduction separately in income tax return by my wife and himself. What procedure adopted by me . My payments to builders equally transfer as a loan and advance to wife . Ii is legally possible for income tax deduction. Please advise me