Goods and Services Tax (GST) is an indirect tax reform which aims to remove tax barriers between states and create a single market. For that to happen the constitution first needs to be amended to remove different layers of governments' exclusive powers to levy taxes
How does the GST work?
GST is charged on the value or selling price of the products. The amount of GST incurred on input (input tax) can be deducted from the amount of GST charged (output tax) by the registered person. However, if the input tax is more than the output tax, the difference will be refunded by the Government.