GST RETURNS FOR AGENT

An agent who works on commission basis doesn't purchase goods from the principal company but only sends the commission working for invoices which comes under his commission.


The agent doesn't purchase nor does he makes any sales. Only works on commission basis.
The principal company sends the goods to the concerned party.


How to and where can i file the details of the same?

Can someone clarify the same?
Would help me a lot!

Thanks!