Service tax on transportation of purchase goods

1st of all, be clear that nothing is exempt, GTA service used in in movement of export cargo upto customs station is subject to rebate claim of service tax, 

for other incidents, viz the procurement of goods or inputs for export purpose, the same is cenvatable, subject to conditions fulfilled under CCR2004, hence no loss at this point.

sale against form H is not the export of the manufacturer, but its export conducted by merchant exporter, hence manufacturer is not eligible for any benefit, but to clear the goods under CT-1 / form H, without payment of duty /vat/cst.  balance service tax provisions are not exempted, however if the merchant exporter has paid service tax on GTA they have option to claim the rebate of same under form A

read the notification in this regard

https://www.servicetax.gov.in/notifications/notfns-2012/st41-2012.htm