For India GST returns, the GST Portal’s standard GSTR-1 deadline is the 11th of the next month for monthly filers or the 13th of the month after a quarter for quarterly filers. A government notification may extend a date. Corrections, filing dependencies and input tax credit (ITC) rules can affect what you need to do, so check the due date shown for your return period on the GST Portal rather than treating a standard date as your personal deadline.
This guide covers the general GST Portal framework in India, checked on 7 October 2026. Your applicable return frequency, registration category, principal place of business and any current notification can change what applies to you.
What is the due date for filing GSTR-1?
The GST Portal gives these standard GSTR-1 deadlines. It expressly allows for other dates extended by government notification; the examples on its guide page are historical, not upcoming deadlines. See the GST Portal’s GSTR-1 guide.
| Filing frequency | Standard GSTR-1 due date |
|---|---|
| Monthly | 11th day of the succeeding month |
| Quarterly | 13th day of the month after the quarter ends |
These are standard dates, not a way to calculate every filer’s actual deadline. For GSTR-3B, the return used to report liability and ITC, quarterly due dates can also depend on the principal place of business. The CBIC rules PDF available here is an older compilation, so it illustrates why one quarterly date may not fit everyone; use the GST Portal’s due date for the selected period and check any current notification. CBIC CGST Rules compilation.
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Can you correct GSTR-1 after filing or add a missed invoice?
Before filing GSTR-1
Uploaded invoice details remain in draft until the statement is filed. You can modify or delete them before filing, so review the entries while they are still editable.
After filing: GSTR-1A
GSTR-1A is an optional amendment opportunity for the same tax period. The GST Portal says it becomes available after GSTR-1 has been filed or its due date has arrived, whichever is later. You can use it to correct an error or add a missed record, but it can be filed only once and only before filing GSTR-3B for that period. The GSTR-1 guide explains GSTR-1A and the filing sequence.
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Previous financial-year records
The GST Portal guide states that errors or omissions for a previous financial year cannot be rectified after 30 November of the following financial year. Treat this as the portal’s stated framework, not a personalized deadline: the applicable statutory text and later amendments or extensions may matter. The guide’s example relates to FY 2022–23 and is historical. The CBIC CGST Act text.
When will a supplier’s GSTR-1A correction appear in your GSTR-2B?
According to the GST Portal, information declared or amended by a supplier through GSTR-1A becomes available to the recipient in the next tax period’s GSTR-2B. Supplier filing and recipient-side statement timing are therefore related, but they are not necessarily a same-period event. Check the relevant GSTR-2B and reconcile it with your records before deciding whether to claim credit. GST Portal GSTR-2B FAQs.
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Does an invoice in GSTR-2B automatically qualify for ITC?
No. GSTR-2B is a reconciliation input, not proof by itself that every listed amount is eligible to claim. The CBIC CGST Act page describes conditions and restrictions that include having an invoice or debit note, receiving the supply, meeting tax-payment requirements and filing the section 39 return. Eligibility still depends on the transaction, supporting documents, applicable rules and the taxpayer’s facts. CBIC CGST Act text.
That CBIC page is an older consolidated presentation. It describes a section 16(4) time limit linked to the September return following the financial year or the relevant annual return, whichever is earlier; it does not establish every current amendment or special rule. Do not treat that description as a definitive current cutoff without checking the law applicable to your claim. Also distinguish the time limit for claiming ITC from the GST Portal’s stated 30 November framework for rectifying previous-year errors: they are related compliance issues, but not interchangeable tests.
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Do you have to file GSTR-1 if there was no business activity?
The GST Portal guide says GSTR-1 is required even when there was no business activity in the period. Filing requirements can depend on taxpayer category, so check your GST Portal return dashboard and the rules that apply to your registration rather than assuming the guide’s statement covers every category. The portal also describes blocks related to unfiled preceding returns, including dependencies between GSTR-1 and GSTR-3B. Check the GST Portal’s GSTR-1 guide.
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What to check before submitting a return
- Confirm the return period and whether your filing frequency is monthly or quarterly.
- Use the GST Portal dashboard to confirm the deadline for that period and check for a government extension.
- Review GSTR-1 entries before filing; if a same-period correction is needed later, check whether GSTR-1A is available before GSTR-3B is filed.
- For ITC, reconcile GSTR-2B against invoices, receipt of supply and other eligibility requirements; do not rely on statement visibility alone.
- Check for preceding returns that may block filing, and confirm the requirements for your registration category.
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