In view of decision by DHC in "Home Solutions Retails India Ltd & others" we are still charging the service tax on Rent in the Invoice and depositing tax on receipt basis i.e amount of service tax received less Input credit and not depositing for those amoont of ST not recd.
An alternate view is given by some consultant that we should treat the ST as amount recd on behalf of Govt and deposit it U/s 73A of ST act.