Held that a reading of section 80A(5) and section 80AC of the Income-tax Act, 1961, as they stood prior to April 1, 2018, would reveal that the statutory scheme under the Act was to admit only such claims for deduction under section 80P of the Act as were made by the assessee in a return of income filed by him. That return could be under section 139(1), (4), 142(1) or 148, and to be valid, had to be filed within the due date contemplated under those provisions. Under section 80A(5), the claim for deduction under section 80P could be made by an assessee in a return filed within the time prescribed for filing such returns under any of the above provisions. The amendment to section 80AC with effect from April 1, 2018, however, mandated that for an assessee to get a deduction under section 80P of the Income-tax Act, it had to furnish a return of his income for such assessment year on or before the due date specified in section 139(1) of the Income-tax Act. In other words, after April 1, 2018, even if the assessee made its claim for deduction under section 80P in a return filed within time under section 139(4), 142(1) or 148, it would not be allowed the deduction, unless the return in question was filed within the due date prescribed under section 139(1). Thus, it is clear that the statutory scheme permits the allowance of a deduction under section 80P of the Act only if it is made in a return recognised as such under the Act, and after April 1, 2018, only if that return is one filed within the time prescribed under section 139(1) of the Act. On the facts as the returns in these cases, for the assessment years 2009-10 and 2010-11, were admittedly filed after the dates prescribed under section 139(1) and (4) or in the notices issued under section 142(1) and section 148, the returns were non est and could not have been acted upon by the Assessing Officer even though they were filed before the completion of the assessment.(AY.2009-10, 2010-11)