Notice u/s 154 - rectification request

Dear Experts,

Already I have filled return IT return for the year 2014-2015 but demand notice came u/s 154.

In that sch TDS incorrect filled. Now I have to file revised return or file rectifiation request.

how to file rectification request for that actually I have filled incorrect TAN No in Sch TDS. but in 26AS correct TAN.

I want to file rectification request. Please can any clarify urgent.

In that which category have to select? please explain brief..

Thanks in advance.