The GSTN Update 2026, introducing the standardized GSTN Annexure B Utility, is one of the most important changes for businesses claiming GST refunds. The new utility aims to simplify the GST Refund Process in India by enabling automated invoice validation, structured reporting, and faster refund processing.

Businesses applying for an accumulated ITC refund through GST Refund Application RFD-01 will now need to submit Annexure-B using GSTN's prescribed utility. The system will perform GST invoice verification by validating purchase invoices against GST records, including GSTR-2B matching, before processing refund claims.

Whether you are an exporter, an SEZ supplier, or a business claiming an ITC refund for GST, understanding this update is crucial for successful refund filing.

• What Is Annexure B Under GST?
• What Has Changed?
• Which Refund Categories Are Covered?
• Key Features of the New Annexure-B Utility
• Impact of Annexure B Utility on Businesses
• Best Practices and Common Challenges
• Frequently Asked Questions

What Is Annexure B Under GST?

Annexure-B is a statement containing details of inward supplies (purchases) on which Input Tax Credit has been claimed while applying for specific GST refunds involving accumulated ITC.

It serves as supporting documentation for refund applications filed through GST Form RFD-01 and helps GST authorities verify the ITC being claimed.

What Has Changed?

Earlier Process — under the previous system, Annexure-B was prepared manually. Businesses uploaded PDF or Excel files, and GST officers verified invoices manually. Refund processing depended heavily on departmental scrutiny.

New Process — under the revised system, Annexure-B must be prepared using GSTN's prescribed Excel-based utility. Data is converted into a JSON file, which is uploaded directly on the GST portal. Invoice details are automatically validated against GST records, including GSTR-2B, and the system flags mismatches before refund processing.

This transforms GST refund filing from a document-based process into a data-driven verification mechanism.

Which Refund Categories Are Covered?

The utility is mandatory for refund applications involving accumulated ITC under the following categories:

• Export of goods/services without payment of tax (LUT)
• Supplies made to SEZ units/developers without payment of tax
• Refund due to inverted duty structure
• Export of electricity without payment of tax

Key Features of the New Annexure-B Utility

1. Automated Invoice Verification
The biggest change is automated invoice matching. Invoices uploaded through Annexure-B will be validated against GSTR-2B records available on the GST portal. This significantly reduces the chances of claiming refunds on unmatched or invalid invoices.

2. HSN/SAC-wise Reporting
Businesses must now report inward supply details HSN/SAC-wise. This allows GSTN to perform deeper validation and improves the quality of refund data submitted.

3. Separate Classification of Purchases
Taxpayers must classify purchases separately as inputs, input services, and capital goods. This improves the accuracy of refund calculations and ITC eligibility determination.

4. Disclosure of Blocked ITC
The utility requires separate disclosure of blocked ITC under Section 17(5) of the CGST Act. This ensures ineligible credits are not accidentally included in refund claims.

5. Reporting of ITC Reversals
Separate tables have been introduced for reporting reversals under Rule 38, Rule 42, Rule 43, Section 17(5), and other reversals. This gives GST authorities greater visibility into the taxpayer's ITC position.

What Is the Role of GSTR-2B in Refund Verification?

Under the new framework, GSTR-2B becomes even more critical.

• The system cross-checks invoice data reported in Annexure-B with invoices reflected in GSTR-2B.
• If discrepancies exist, they may be flagged in the validation process before the refund claim is processed.
• This means businesses can no longer rely solely on purchase records maintained internally.
• Vendor compliance now directly affects refund eligibility.

Impact of Annexure B Utility on Businesses

Exporters are among the biggest stakeholders affected by this change. Since export refund claims often involve large accumulated ITC balances, businesses will now need better vendor compliance monitoring, accurate invoice tracking, regular GSTR-2B reconciliation, and proper ITC classification.

Failure to reconcile invoices before filing may delay refunds or trigger validation errors.

Best Practices for Businesses

To ensure smooth ITC refund processing:

• Reconcile GSTR-2B every month; don't wait until refund filing. Monthly reconciliation helps identify vendor-related issues early.
• Track vendor compliance and follow up with suppliers who delay GSTR-1 filing.
• Maintain proper HSN/SAC mapping, since incorrect HSN/SAC reporting can lead to validation failures.
• Review ITC reversals carefully to ensure all reversals are reported correctly.
• Use GST-compliant accounting software, since automated reconciliation and invoice management can reduce refund filing errors.

Conclusion on Annexure B Utility Update

GSTN's standardized Annexure-B Utility marks a significant shift toward an automated GST refund process in India. By replacing manual PDF uploads with structured, system-validated data, GST invoice verification, improving GSTR-2B matching, and standardizing GST Refund Application RFD-01 submissions, the government aims to improve transparency, reduce refund disputes, and accelerate processing times.

For businesses, especially exporters, SEZ suppliers, and MSMEs claiming accumulated ITC refunds, the message is clear: invoice reconciliation, vendor compliance, and accurate GST reporting are no longer optional. They are essential for faster and smoother refund approvals.