S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Beyond three years-Income alleged escapement was less than 50 lakhs, i.e., 32.78 lakhs-Reassessment notice and consequential assessment orders were void ab initio, hence quashed. [S. 56 (2) (vii)(b), 147, 148, 148A(b), 148A(d), 149(1)(b)]