Under the GST regime, businesses whose turnover exceeds INR 40 lakhs (INR10 lakhs for North-east and hill regions) are required to register as a normal taxable person. This registration process is called the GST registration system. Registration under the GST is compulsory for certain businesses. If the company carries on business without registration under the GST, it will be an offence under the GST and severe penalties will apply. GSTIN (GST Registration Number) is a unique identification number for each GST taxpayer. To verify a GSTIN number, an individual who has a GST number may log in to the GST portal.