Amendment of Outward Supplies_GSTR 1

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praveen (Querist)
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18 February 2026 Hello All,
One of our client had wrongly filed GSTR 1 of August 2025 considering invoice date as 31/03/2025 instead of 31/08/2025. Is it possible to amendment such invoice now with correct invoice date as 31/08/2025. Kindly suggest to resolve the issue.

Dhirajlal Rambhia

Dhirajlal Rambhia (Expert)
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18 February 2026 No, it is not possible to amend the invoice date from 31/03/2025 to 31/August/2025 in GSTR-1 for August 2025.
GST rules allow amendments to GSTR-1 details, including invoice dates, but the revised date cannot exceed the last day of the original tax period. Changing it to an earlier date like March shifts the supply to a prior period, which violates this restriction and will trigger validation errors on the GST portal.

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Dhirajlal Rambhia

Dhirajlal Rambhia (Expert)
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18 February 2026 Cancel the incorrect invoice via a Credit Note in a subsequent GSTR-1 (e.g., September 2025 or later, within 30 Sep 2026 limit).

Issue a new invoice dated 31/08/2025 and report it in the correct August GSTR-1 amendment table.

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