from 1st April 2011 issue of from 16A, downloaded from tin website is mandatory on Companies (includes Banking companies registered under Indian Banking Act 1949 & co-oprative bank , finiancial banking organization under 57 of the said Act. other Properietorp Concern, Firm, Co-opattive Sociaties , AOP, BOI may issue Form 16A downloaded from tin-website or issued manually .But from 1st April 2012 its manditory all of the concerns to issue From 16A after downloaded from tin-website. & issue of FROM 16 is not manditory to download ,one conern may issue it manually.