S. 147 : Reassessment-After the expiry of four years-Compensation-Business expenditure-No new tangible material-Assessee had filed reply during original assessment proceedings-twin conditions-New tangible material and failure on the part of the assessee to disclose all material facts truly and fully, does not exist-Notice and order disposing the objection is quashed. [S. 37(1), 148, Art. 226]