Regarding outstanding tax demand which I see after I login

After I login today (23-09-15) at IT site I see "my pending actions" flashing. Clicking this shows me details of out standing demand. "Date of notice u/s 235" is written on top: AY is given as 2011-12; "Section Code" is given as 1431a; Next a DIN number is given; Date when demand is raised is given as 13/01/12; Outstanding amount is given as Rs 400/-; Under "uploaded by" Jurisdictional AO is stated; Under "Rectification Rights", Assessing officer is stated; Finally under "Response", two options are shown: Submit OR View. In the Notes listed below, there is a clickable option given as "Resend of intimation request" So, how do I settle this demand? Do I pay using Challan 280? What Assessment year do I fill in? 11-12 OR 16-17? What should be the type of payment? Advance tax OR Self assessment tax? What do I do regarding "submit" option OR the option "Resend of Intimation request". I paid my total advance of Rs 14788/- for AY-11-12 on 15th March 2011 as a single payment (not as installments). Is this Rs 400/- tax demand due to penalty/interest for my not paying my advance tax (which is above Rs 10,000/-) in installments (i.e. 30% of advance tax on or before 15th Sept 2010, 60% on or before 15th Dec and remaining within 15th March 2011?)? Please explain how I should pay this outstanding demand amount now. Prabir K De E-mail: [deleted]