17 December 2012
There is no Section as such. You can simply write a Reply to Assessing Officer.
However, if AO is not satisfied then he may still pass a Penalty order. Now you appeal to CIT(A) against Penalty order and file a Stay Petition to CIT.
Once Stay Petition is rejected by CIT, you can file stay petition to ITAT and only then client can be releived of Demand Proceedings.