I am an individual doing business. I was having sales below 40 lakhs in the year 2008-09 and I was not deducting TDS on payment or bills. In the year 2009-10 the sale is more than 40 lakhs and liable to TAX audit . Now I have to deduct TDS. The sale of Rs.40lakhs is crossed from January 2010. From which date TDS is to be deducted.