S. 148A: Reassessment-Conducting inquiry, providing opportunity before issue of notice-Original notice under section 148 issued before 1-4-2021 which culminated in reassessment order attaining finality-Fresh notice under section 148A(b) issued pursuant to direction of Supreme Court in UOI v. Ashish Agarwal (2022) 444 ITR1 (SC), Supreme Court directions limited to pending reassessment proceedings-Notice and order quashed Fresh reassessment impermissible for concluded assessment [S. 147, 148, 148A(b), 148A(d), Art. 226]