S. 143(2) : Assessment –Notice-Limitation-To be reckoned from date of filing of original return and not from date of curing of defects-Return filed under section 139(1) within time-Defect notice under section 139(9) subsequently cured-Notice under section 143(2) issued beyond time-limit reckoned from date of original return-Assessment without jurisdiction-Quashed. [S. 139(1), 139(9)]