UNDER SCRUTINY: Rs 56,000 crore worth of trades monthly from 2009 to 2011 The case of client code changes in the stock market is set to haunt stock brokers again. The income tax (I-T) department is preparing to send notices to more brokers for the assessment year 2010-2011and 2011-12 when the practice of changing client codes within 30 minutes after market close to rectify punching errors was common. The tax department felt brokers resorted to this practice to avoid paying taxes as client code modifications constituted ` . 56,000 crore worth of trades every month between 2009 and 2011. Gains and losses were transferred from one account to another under the guise of rectifying errors. In the past, tax notices have been served on over 100 brokers at the start of 2016 for assessment year 2009-2010 but the same were pending for the following two assessment years, said a senior IT official in Mumbai. The review for 2009-2010 will be complete by December and another set of notices will be