Can a Retailer Change MRP?

No you can not change MRP but in this transaction period Government has release this notification

"Under the GST regime, if a price of a product has increased the manufacturer/ importer/ packer will have to give an advertisement in two newspapers about the new MRP and put a revised sticker on the packaging,", Department of Consumer Affairs Secretary Avinash Srivastava said. Both the new and the old MRP must show on the packaging, he added.