Goods and Services Tax Identification Number
15-digit unique identifier for any GST-registered taxpayer.
GSTIN format: 2-digit state code + 10-digit PAN + 1-digit entity code + 1-digit check + 1-digit Z. Issued by GSTN within 3-7 working days of REG-01 application. Mandatory above ₹40L turnover (goods) or ₹20L (services), or any e-commerce seller.
Every GST-registered business.