i want to know whether it is compulsory to deduct TDS on salary from starting month of year. eg if a employee is taking salary of Rs. 20000 pm for f/y 2012-13. employer does not deduct TDS in the month of april but start deducting TDS from october month amounting Rs 500 and same amount in next month but in the month of march employer deduct whole amount of TDS which is applicable. i want to know whether it is contravention of act?