Income Tax Intimation under 143(1)

Hey you have to reply to the office from where you got the intimation.

there may be a mistake in the income tax department, which can be rectify by a simple request to be sende to them regarding the mistake done during the assesing the income of you for the assesment year 2008-09. you have to send a letter u/s 154 of the Income Tax Act. along with the copy of form 16.

Thanks for your response. I hope that it is a mistake (perhaps a bug in some software) of the IT folks. In any case, I think I've to respond as you are suggesting. Can you please mention if there is any specific format in which I should write the letter u/s 154 ? I mean, is there some online format (.pdf file) maintained by the IT department, which I've to download, fill up and send ? Or is it just that I've to write it on a white paper ? If it is the latter, whom should I address it to ? And what should be the basic content ? I guess, I have to attach my old ITR and Form 16 as well.

Apparently, the location from whichi I got the letter (Centralized processing center, IT department, Post Bag no. 1, Electronics City, Bangalore) is not the address of the IT department. So, do I have to send reply by post to this address,  or do I have to manually go the actual IT office and tell them about this ?