S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Non-existent entity-Company had amalgamated with assessee-company with effect from 1-4-2005 and the Assessing Officer was duly informed; notice under section 148 issued against amalgamated non-existent entity was without jurisdiction and assessment was non-est. [S. 147, 148, 148A(b), 226]