A company had mentioned wrong TAN in tds challan for the FY 2009-10 for 3dr quarter. we had given letter to concerned TDS assessing officer to rectify the same. the same was rectified by him and letter to the effect was also given by him. But the correct TAN no. is not reflecting in challan enquiry status on NSDL site. What is the procedure to get it corrected on NSDL records? when we are filing the TDS-return it is generating challan mismatch report as the TAN is not corrected in NSDL records. Plz provide the solution for the same. WE spoke to Chennai branch office of NSDL but they are unable to provide any solution for the same. we gettingso many calls from our deductees that the said challan does not reflect in their Form 26AS online tax credit view.