Quick Summary

GSTN has changed the timeline for amending the Aggregate Annual Turnover (AATO) for the financial year 2025-26. Instead of opening the amendment window in May, taxpayers can now submit correction requests from 1 July to 31 July 2026. Tax officers will verify these requests between 1 August and 15 August 2026.

The change is part of a system upgrade that will automatically update AATO when future GST returns are filed, helping improve the accuracy of turnover information across the GST Portal.

What is this update?

GSTN has introduced a new schedule for correcting the Aggregate Annual Turnover (AATO) for FY 2025-26.

Earlier, businesses could request corrections during the month of May. Under the revised process, the amendment window has been shifted to July.

This change supports a new system that automatically updates AATO whenever additional GST returns are filed after the amendment period.

What is Aggregate Annual Turnover (AATO)?

Aggregate Annual Turnover (AATO) is the total value of all taxable supplies, exempt supplies, exports, and inter-state supplies made under the same PAN during a financial year.

It is used by GST authorities to determine various compliance requirements, such as:

GST return filing frequency
QRMP Scheme eligibility
E-Invoicing applicability
Other GST-related thresholds

Because many GST rules depend on AATO, keeping it accurate is very important.

Why has the government introduced this change?

GSTN is upgrading its system to make AATO more accurate and consistent.

The new enhancement will automatically revise turnover whenever taxpayers file pending or revised GST returns after the amendment period.

This reduces manual corrections and helps ensure that turnover data remains consistent across different GST modules.

The main objectives are:

Improve data accuracy
Reduce mismatches
Maintain consistency across GST systems
Simplify future updates
Reduce manual intervention

Who is affected?

This update is useful for:

Registered GST taxpayers
Businesses whose turnover needs correction
Companies that filed returns late
Chartered Accountants
Tax Consultants
GST Practitioners
Accountants
Businesses using the GST Portal

Who is NOT affected?

This update generally does not affect:

Businesses with no need to amend their AATO.
Persons who are not registered under GST.
Taxpayers whose turnover details are already correct.

Important Dates

Activity	Revised Timeline
AATO Amendment Window	1 July – 31 July 2026
Verification by Tax Officer	1 August – 15 August 2026

Key Changes

The major changes introduced by GSTN are:

Amendment window shifted from May to July.
New timeline applies to FY 2025-26.
Tax officers will verify amendments during August.
Automatic AATO updates will happen after future GST return filings.
Better consistency across GST Portal modules.

Benefits

The revised system offers several advantages.

Better Accuracy

Future GST returns can automatically update turnover.

Reduced Errors

Less manual correction is required.

Improved Compliance

Correct turnover helps businesses comply with GST rules.

Better Data Matching

The same turnover will be reflected consistently across GST services.

Easier Administration

Tax officers can review corrected data within a fixed period.

Disadvantages (If Any)

Although the update is beneficial, there are a few points to consider.

Taxpayers have only one month to submit amendments.
Incorrect amendment requests may delay approval.
Missing the amendment window may require waiting for future system updates where applicable.

Compliance Requirements

Businesses should:

Check their AATO carefully.
Compare turnover with GST returns.
Correct any mistakes before submitting.
Keep supporting records ready.
Submit amendments before 31 July 2026.
Monitor the application status after submission.

Step-by-Step Process

Step 1

Step 2

Navigate to the AATO Amendment section.

Step 3

Review the turnover displayed by the system.

Step 4

Enter the correct Aggregate Annual Turnover if changes are needed.

Step 5

Verify the details carefully.

Step 6

Submit the amendment request.

Step 7

Wait for review by the jurisdictional tax officer.

Example

Suppose ABC Traders has an actual Aggregate Annual Turnover of ₹4.95 crore for FY 2025-26.

However, the GST Portal shows ₹4.55 crore because some GST returns were filed later.

ABC Traders should:

Review the turnover.
Submit an amendment request between 1 July and 31 July 2026.
Keep supporting records available if required.

Therefore, businesses should ensure their turnover details are accurate.

Important Points to Remember

Amendment window has shifted from May to July.
Applies only for FY 2025-26.
Amendment period is from 1 July to 31 July 2026.
Tax officers will review requests from 1 August to 15 August 2026.
GSTN is introducing automatic AATO updates after future return filings.
Always verify turnover before submitting an amendment.
Keep supporting documents ready.

Conclusion

The revised AATO amendment timeline for FY 2025-26 is part of GSTN’s efforts to improve the accuracy of turnover information across the GST Portal. By moving the amendment window to July and introducing automatic updates after future return filings, GSTN aims to reduce inconsistencies and make compliance easier.

Businesses should review their Aggregate Annual Turnover carefully, submit any necessary corrections within the revised timeline, and maintain proper records to support the amended figures. Keeping AATO accurate is important because it affects several GST compliances, including return filing requirements and eligibility under various schemes.

Quick Key Takeaways

AATO amendment window: 1 July to 31 July 2026
Tax officer review: 1 August to 15 August 2026
Applicable for: FY 2025-26
Reason for change: Automatic AATO updates after future GST return filings
Who should act: Taxpayers whose Aggregate Annual Turnover requires correction
Penalty: No separate penalty announced, but incorrect AATO can affect GST compliance

Frequently Asked Questions (FAQs)

1. What is Aggregate Annual Turnover (AATO) under GST?

Aggregate Annual Turnover (AATO) is the total value of taxable supplies, exempt supplies, exports, and inter-state supplies made by a business under the same PAN during a financial year. It is used to determine eligibility for various GST compliances.

2. What is the new AATO amendment timeline for FY 2025-26?

Taxpayers can submit AATO amendment requests from 1 July 2026 to 31 July 2026. Tax officers will review these requests between 1 August and 15 August 2026.

3. Why has GSTN changed the AATO amendment timeline?

GSTN has upgraded its system to automatically update Aggregate Annual Turnover when additional GST returns are filed. The revised timeline supports this new automated process and improves data accuracy.

4. Who can amend Aggregate Annual Turnover?

Any registered taxpayer who finds that the AATO displayed on the GST Portal is incorrect for FY 2025-26 can submit an amendment request during the specified period.

5. Is it mandatory to amend AATO?

No. An amendment is required only if the turnover shown on the GST Portal is incorrect.

6. What happens if I do not amend my AATO?

If your turnover is incorrect, it may affect GST compliance such as QRMP eligibility, e-Invoice applicability, return filing requirements, and other turnover-based provisions.

7. Can I amend AATO after 31 July 2026?

The GSTN advisory specifies that the amendment window for FY 2025-26 is available only from 1 July to 31 July 2026.

8. Will GSTN automatically update AATO?

Yes. GSTN is introducing a system that automatically updates Aggregate Annual Turnover whenever eligible GST returns are filed after the amendment period.

9. How do tax officers verify AATO amendments?

Jurisdictional tax officers will review amendment requests between 1 August and 15 August 2026 based on the information submitted by taxpayers.

10. Does this update apply to all taxpayers?

It mainly affects GST-registered taxpayers who need to correct their Aggregate Annual Turnover for FY 2025-26.

11. Is there any penalty for not amending AATO?

The advisory does not prescribe any separate penalty. However, incorrect turnover information can affect compliance under various GST provisions.

12. How can I check my AATO on the GST Portal?

After logging into the GST Portal, taxpayers can access the Aggregate Annual Turnover section to view the turnover calculated by the system.

13. Why is accurate AATO important?

Many GST rules, including QRMP eligibility, e-Invoice applicability, and compliance thresholds, depend on Aggregate Annual Turnover.

14. What documents should I keep before submitting an amendment?

Businesses should keep GST returns, sales records, turnover calculations, invoices, and any supporting documents that justify the revised turnover.

15. Where can I raise a grievance if I face issues?

GSTN has advised taxpayers to use the Self-Service Portal available on the GST Portal for reporting any technical or procedural issues.