I am unable to do correction online for Financial Years 2007-08, 2008-09, 2009-10. The message displayed is correction is to be done through NSDL. For the demands raised by Income Tax, I have paid the TDS Challans. I have to add the new challans for the above mentioned years. RPU Version 1.3 ( Java) doesn't allow to add challans for doing the corrections. Can our respected experts on Tds give a solution to solve this problem.