S. 254(2) : Appellate Tribunal-Rectification of mistake apparent from the record-Jurisdictional High Court-Tribunal’s order based on decision of Supreme Court-Supreme Court Dismissing Special Leave Petition filed by Department-Tribunal’s order cannot be rectified-No addition can be made in respect of assessments which have become final if no incriminating material is found during search–ICDs and CFSs are infrastructural facility entitled to deduction under sub-section (4) of section 80-IA. [S.80IA(4), Art. 141]