How to Verify GSTIN and Check Supplier Return Filing Risk to Protect Your Input Tax Credit (ITC)

The Strict Rules of Input Tax Credit (ITC) Under Section 16(2)(aa)

Under amendments to the CGST Act, a registered taxpayer can claim Input Tax Credit on vendor purchases ONLY IF the supplier has uploaded the invoice in their GSTR-1 and it is reflected in the recipient's auto-populated Form GSTR-2B. If your vendor collects GST from you but fails to file their return, your credit is blocked, and the department will demand tax with interest.

Deconstructing the 15-Digit GSTIN

• Digits 1-2: State Code (e.g., 09 for Uttar Pradesh, 27 for Maharashtra).
• Digits 3-12: Permanent Account Number (PAN) of the business entity.
• Digit 13: Entity number of the same PAN within the state (1, 2, 3, etc.).
• Digit 14: Default character "Z".
• Digit 15: Checksum validation digit.