e commerce sales

As per sec 9(5) ECO is liable to pay gst on the supplies if you r an unregistered person. if you are a registered person you have to pay GST and Show it as supply in your GSTR-1, and at the same time ECO will collect TCS @ 1% and submit to the government which will be available in your cash ledger.(it is immaterial whether the recipient of your service is registered or unregistered person)