21 September 2017
Notification 12 Central Tax (rate) Exempt the following service provided under heading 9967 or 9965 goods, where consideration charged for the transportation of goods on a consignment transported in a single carriage does not exceed one thousand five hundred rupees; goods, where consideration charged for transportation of all such goods for a single consignee does not exceed rupees seven hundred and fifty;
So Based on this exemption you are not liable to pay RCM GST on GTA charge of Rs. 622/-