Itr1 efilled with error

Sir,

    I have e-filled my returns through https://incometaxindiaefiling.gov.in  for AY 2011-12 with some errors. I wrongly mentioned "Tax deducted details" in "Details of Advance Tax and Self Assessment Tax Payments" section (25).  So i got a reply from CPC like "e-Return has been processed at CPC - demand determined (tax is payable)". Now i know the problem. If i remove "Tax deducted details" from section 25 in ITR1 form, everything is OK. Can you please suggest me what needs to be done?

Thanks,
Ramesh.N