Dear Mr. Srinivasan,
Thanks for sending the details of Outstanding Tax demand. Prima facie, it looks like the Advance Tax paid by you is not reflecting under Prepaid Taxes.
Request you to send the Form 26AS for AY 2012-13 and the Intimation u/s 143(1). You would have received the same from the email ID intimations@cpc.gov.in.
If you are unable to find the same in your email records, you can request for Intimation u/s 143(1) from your IT Websie Login.
After logging in, click on My Account - Request for Intimation u/s 143(1)/154
Select AY 2012-13 and Category Intimation u/s 143(1).
You will receive an email with Intimation u/s 143(1) to your registered email ID in a few days (Usually 2-3 working days). Kindly forward the same to my email ID once you receive the same.