A Pvt. Ltd. Co. doing constuction work, is not registered with service tax dept yet, as it is 1st year and turnover has not exceeded Rs. 15 lacs. However it purchases material and pays transportation charges of Rs. 20,000/-. Is it supposed to pay service tax on this amount as "specified person"? If yes, Is the company supposed to take service tax registration for payment of service tax on GTA for a smaller amount of Rs. 515/- (Rs. 20,000* 25 % * 10.30%)