Wrongly entered challan number

First you have to check any demand raised by logging in Income tax website. If you received then reply to Outstanding Tax demand stating wrongly typed challan serial number.

If you didnt received any demand/communication then its better to file revised return.

Make hay while the sun shines

If assessment is not complete then you can revise it. Try the option Change ITR Fom Particulars in efiling and see if it helps. If you have got 143(1) notification for Tax credit mismatch, rectify it.

Kindly clarify you mentioned the challan number which was stamped by bank or the challan number 280......

Yes I agree with manish jain. If you have mentioned sr no of the challan then it is actually correct. No revision is required. If you have mentioned 280 in your it return, then you need to revise it immediately

No revision is required as you filed the ITR with the correct information,

You have to  write challan Identfication No  [CIN] and not challan No 280.

There is no need to write CIN number

1. There is no need to mention CIN 

@ Yash trivedi:

It is not possible. Without entering CIN, the tax credit would not get effected in tti schedule. Also the return will show errors when creating an XML of the file.

I am agree with Rinkle......X M L can not be generated without mention the CIN while filing the ITR

CIN and BSR code were same