Circular No. 664-Income tax Reference is invited to the Board’s Circular No. 597, dated 27-3-1991, containing instructions regarding the use of Form Nos. 16, 16A and 16B for issuing certificates of tax deducted at source, under the various provisions of the Income-tax Act, 1961. These three forms had replaced the earlier unified Form No. 16 with effect from 28-2-1991 vide the Income-tax
