GST Registration of a business with the tax authorities implies obtaining a unique, 15-digit Goods and Service Tax Identification Number (GSTIN) from the GST authorities so that all the operations of and the data relating to the business can be collected and correlated.
What is the purpose of GST registration?
Registration of an assessee or a 'taxable person' is the starting point in any tax law. It is the most fundamental requirement of identification of the business for tax purposes and monitoring compliance requirements.