S. 154 : Rectification of mistake-Mistake apparent from the record-Inadvertently disclosed income in its return-Return was accepted u/s. 139(1)-Rectification is rejected-Tribunal allowing the claim-Dismissing the appeal the Court held that merely because respondent included the income in the return as taxable cannot make it amenable to imposition of tax-DTAA-India-USA [. S. 139(1),143(1), 260A, Art. 14]