Ours is a GST registered Pvt Ltd company engaged in Manufacturing of toothpaste. One of our client wants to manufacture his toothpaste under P2P basis by supplying some of packing materials i.e. empty tubes and cartons under bill to ship to system. They will order those packing materials wherein we will be recipient of packing material and He will be buyer for that. Now what are the things we should taken care of under GST?. Do we require to maintain separate records for that? Do we need to mention in our monthly 3B return?