Published on: July 7, 2026

The Goods and Services Tax Network (GSTN) has issued an important advisory regarding the revision of the timeline for amendment of Aggregate Annual Turnover (AATO) for Financial Year 2025-26.

This change has been introduced as GSTN upgrades the AATO functionality on the GST Portal. The enhanced system will automatically update the Aggregate Annual Turnover whenever subsequent GST returns are filed after the amendment window, ensuring greater accuracy and consistency across the portal.

Why Has the Timeline Changed?

Previously, as per the GSTN advisory dated 02 May 2022, taxpayers could amend their Aggregate Annual Turnover during the month of May. This process was applicable up to FY 2024-25.

For FY 2025-26, GSTN has revised the schedule to support the deployment of the upgraded AATO functionality, which becomes effective from 1 July 2026.

The objective of this enhancement is to:

• Improve the accuracy of Aggregate Annual Turnover reporting.
• Ensure consistency across different GST Portal modules.
• Enable automatic updation of AATO as additional GST returns are filed.
• Reduce discrepancies in turnover-related information.

Revised AATO Amendment Timeline for FY 2025-26

What Taxpayers Should Do

Taxpayers are advised to:

• Carefully verify their Aggregate Annual Turnover before submitting the amendment request.
• Submit any required AATO amendments between 1 July and 31 July 2026.
• Ensure that the amended turnover figures are accurate, as they will be reviewed by the jurisdictional Tax Officer from 1 August to 15 August 2026.

Need Assistance?

If taxpayers face any issues while amending their AATO details, they should raise a grievance through the Self-Service Portal available on the GST Portal, providing all relevant information to enable quicker resolution.

Key Highlights

• AATO amendment window shifted from May to July for FY 2025-26.
• Application Period: 01 July – 31 July 2026.
• Tax Officer Review: 01 August – 15 August 2026.
• GSTN has upgraded the AATO functionality to support automatic turnover updates after subsequent GST return filings.
• Taxpayers should review their turnover carefully before submitting amendment requests.

Conclusion

The revised timeline for AATO amendment is part of GSTN's ongoing efforts to modernize the GST Portal and improve data accuracy. Businesses should take note of the new schedule and complete any necessary amendments within the prescribed period to ensure smooth compliance.

Staying updated with GST advisories helps businesses avoid compliance issues and ensures that turnover information remains accurate across all GST-related services.