Goods and Service Tax (GST) is a destination based tax on consumption of goods and services. It is levied at all stages right from manufacture up to final consumption with credit of taxes paid at previous stages available as setoff. In a nutshell, only value addition will be taxed and burden of tax is to be borne by the final consumer.
All entities which carry out function of selling and purchasing of goods and services have to get registered for GST after crossing of threshold limit as decided, GST registration is required primarily if turnover is more than ₹ 20 Lakh. It can also be taken voluntarily. In case an entity doesn’t have GST number it can’t take input of GST which they had paid while purchasing of goods/services, also it would also not be able to sale interstate thus causing hindrance in growth and expansion