Correction in TDS challan on Traces

Hello all,

I want to know what is the duration to make changes in challan on traces.

I made payment on 6th October when I tried to make correction in challan it said correction cannot be made within 15 days of the date of challan, but we have to make corrections within seven days.

If I have to make correction just in AY then will it be accepted on the portal

Please reply at the earliest

TIA