I am running GTA , and I am providing trucks to Defence canteens only for their transportation of canteen items from their main depot to their retail out lets. Suppose my bill amount is ₹ 10000 ,So as per RCM the service receiver has to pay GST to Govt. That is defence canteens has to take GST registration and pay the 5% of 10000 as GST for service. So in my view i need not take GST registration as CSD (defence canteens) are paying GST to Govt for the transportation of their canteen items. please clarify my calculation is correct or not and justify please