S. 144B : Faceless Assessment-Violation of principle of natural justice-Issue of show cause notice and draft assessment order is mandatory-Assessment order, notice of demand and penalty notice was quashed-Matter was remanded back to Assessing Officer, who shall issue a draft assessment order and thereafter pass a reasoned order in accordance with law. [S. 143(3), 144B(7), 156, 271AAC, Art. 226]