(3)If the assessment or reassessment proceedings for an assessment year relevant to a previous year to which the agreement applies have been completed before the expiry of period allowed for furnishing of modified return under sub-section (1), the Assessing Officer shall, in a case where modified return is filed in accordance with the provisions of sub-section (1), proceed to assess or reassess or recompute the total income of the relevant assessment year having regard to and in accordance with the agreement.
