RETURN FILE UNDER COMPOSITION SCGEME

Mr. A takes GST Registration in October month under Composition scheme and Mr A has to file GSTR-4 return for the quarter oct.to dec2017. What other returns are required to be filed by Mr.A . Whether stock details upto september ( before Oct) are required to be filed mandatorily or not under GST CMP-03.

Please suggest me with proper guidelines and notifications.

Thanks