31 March 2009
Dear Bhavin, please tell first of all that your client is a Co. or a partnership firm or Proprietor/ individual. If your client is a co. or a partnership firm then it is mandtory to file electronic return and also pay TDS online. In case of your client is Proprietor/ individual and they are liable to get audit of their books of accounts u/s 44AB then you have to pay TDS online.
Due date of 4th quarter of F.Y. 2008 -2009 is 15th June 2009.