Doubts on pot rule 2011

Sanatan Parida (Deputy. Manager ERP (FICO))   (35 Points)

26 August 2011  

Reg. Point of Taxation Rule 2011, i am having some doubts in respect of the following case.  Kindly clarify :-
 
As per Rule-3 of POT Rule-
 
The point of taxation shall be
a. the time when the invoice fro the service provided or to be provided is issued. Provided that where the invioce is not issued within 14 days of the completion of provision ofservice, the point of taxation shall be the date of such compeletion.
 
Suppose i have to issue a supplementary bill for earlier periods in continious with advance billing on Dt. 13-08-201 (let April'09 to March'12) of which the provision of service has already been completed and yet to be completed,

 is it possible ?


If not what are the wayout ?
 
Kindly guide me.