Regarding the cpc demand arrear

For Demand Arrrear for A.Y. 2008-09, Please tell me about intimation on which amount payable shown

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I have got notice for u/s 143 and amount is approx 25000. MY all tds is reflected in form 26AS. MY employer had deposited the tds and the tds figure in correct in all the documents. Do i need to file a rectificaion? I have given an application to delete this demand in favour of me on simple plain paper. Is that suffice or i need to do something more?

Thanks,