S. 263 : Commissioner – Revision of orders prejudicial to revenue-Income deemed to accrue or arise in India – Where the AO had made due enquiries with regard to receipts of assessee from services rendered outside India and where receipts were not taxable in India under article 15 of DTAA between India and USA, exercise of jurisdiction under section 263 was not justified- DTAA- India -USA [ S.9(1)(i), Art .15 ]