S. 201 : Deduction at source-Failure to deduct or pay – Natural justice violated-The order of revenue must speak for itself and cannot be improved upon by an affidavit-in-reply filed by assessee, its not permitted-Orders of revenue were set aside—Matter restored to revenue for fresh disposal of show cause notice after following principles of natural justice i.e. due consideration of assessee submission by speaking order [S. 40(a)(ia), 194C, 194J, 197, 201(1), 201 (IA), Art.226 ]