GST (Goods and Services Tax) is a proposed tax reform in India that would combine several taxes into a single tax applied to the production and distribution of goods and services. It is expected to simplify the tax system and reduce costs for businesses by eliminating cascading taxes and allowing credits for taxes paid at earlier stages of production. The example of leather goods producers Mr. A, B and C is used to illustrate how GST would streamline taxes by providing credits and reducing the overall tax burden through the supply chain compared to current individual taxes.