Under the GST regime, every company that supplies goods and services has to register under GST. Businesses whose turnover exceeds 40 Lakhs, is required to register as a normal taxable person. And for certain businesses GST registration is mandatory. Hence, this process is called GST registration. Once you apply for GST number, you will receive a unique GSTIN (Goods and Service Tax identification number). One of the advantages that you get with GST registration is that you will get a legal identity as a supplier.