S. 147: Reassessment-Audit objection-Non-resident-Assessing Officer must apply independent mind-Audit objection is only “information” and not a command to reopen-Reassessment cannot be used to review a concluded scrutiny assessment-Change of opinion not permissible-In absence of failure to disclose fully and truly all material facts, extended period of six years not available-Limitation restricted to four years from end of relevant assessment year-Notice issued beyond four years held barred by limitation-Notice under section 148A(b), order under section 148A(d) and notice under section 148 quashed. [S. 148A(b), 148A(d), 149, Art. 226]