Difference of interest in itr & calculation by ao

Sanjana (CA Final ) (48 Points)

30 June 2014  

We have filed the Income Tax Return. In that there was a interest u/s 234B & 234C which was calculated by the ITR utility. We have received the intimation u/s 143(1). There is a difference in Interest u/s 234B & 234C. & there is a demand of this amount.The amount of difference is huge. How to deal with it.

Please Help.