Background
1. Assessee is a foreign company executing projects in India
2. All its billings to the clients are in Foreign currency
2. Assessee receives advances in FC from its Indian client
3. Assesse e deposits service tax payable on such advances after converting the FC into Rupees at prevailing exchange rates
4. Assessee adjusts these FC against its regular invoices raised susequently for services rendered and pays service tax on the adjusted FC invoices ( ie gross invoice in FC less prorata advance in FC )
Issue
5. Service tax officials insist on fresh conversion of the FC advance sought to be adjusted at rates prevailing on adjustment dates
6. contention of Assessee is that service tax liability on advance has already been adjusted at time of receipt and no further valuations are called for .
Reference of similar cases would be appreciated