GST Returns: Types, Due Dates & Complete Filing Guide

What is a GST Return?

A GST return is a formal statement filed by a GST-registered person with the government declaring outward supplies, inward supplies, output tax liability, input tax credit, tax paid, and other relevant information for a specific tax period. It is one of the core compliance requirements under GST and acts as the base document for tax payment, ITC flow, and departmental verification.

A GST return is not just a filing formality. It is also the mechanism through which the GST system connects one taxpayer's outward supply with another taxpayer's inward credit trail. When a supplier reports invoice details in GSTR-1 , that information feeds the recipient-side statement framework, especially GSTR-2A and GSTR-2B. This is one of the main reasons GST compliance depends so heavily on accurate and timely return filing.

The key purposes of filing GST returns are:

• to declare GST collected on outward supplies,
• to claim eligible input tax credit on inward supplies,
• to calculate and pay net tax liability,
• to maintain a documented trail for matching, reconciliation, and audit.

Different categories of taxpayers file different forms. A regular taxpayer does not file the same return set as a composition dealer, an ISD, a TDS deductor, or a non-resident taxable person. That is why understanding return types matters before understanding due dates.

Who Should File GST Returns?

Every person registered under GST is expected to comply with the return or statement requirements applicable to that registration category, even where there are no transactions in a period and a nil return is required. The obligation is linked to the type of registration and the applicable form, not merely to whether the business had activity in that month.

This includes:

• regular taxpayers,
• composition scheme taxpayers,
• non-resident taxable persons,
• input service distributors,
• persons liable to deduct TDS,
• e-commerce operators collecting TCS,
• OIDAR service providers,
• UIN holders for inward supply-based refund claims.

A common misunderstanding is that filing becomes relevant only if tax is payable. That is incorrect. Even where there are no outward supplies, no inward supplies, and no tax payable for the period, a nil return may still need to be filed if the registration remains active and the form is applicable.

All GST Return Types - Complete Table

QRMP Scheme - Eligibility, Opt-In and How It Works

The QRMP scheme allows eligible regular taxpayers to reduce the frequency of return filing from monthly to quarterly for GSTR-1 and GSTR-3B, while still continuing monthly tax payments.

Who Is Eligible for QRMP?

A taxpayer can generally use QRMP if:

• aggregate annual turnover in the preceding financial year is up to ₹5 crore,
• the taxpayer is registered as a regular taxpayer,
• the taxpayer is otherwise eligible under the portal rules and has complied with the required filing conditions.

Composition dealers, non-resident taxable persons, and certain special categories do not use QRMP in the same way as regular taxpayers.

How to Opt Into QRMP

Eligible taxpayers can opt in through the GST portal using the quarterly return option available in the returns section. The option window runs within the portal cycle specified for the relevant quarter. Once selected, the change takes effect at the beginning of the relevant quarter.

How Monthly Tax Payment Works Under QRMP

Even though GSTR-1 and GSTR-3B are filed quarterly under QRMP, tax is still paid monthly through Form PMT-06 for the first two months of the quarter.

The Fixed Sum Method broadly uses a pre-filled challan based on the previous net cash tax payment. The Self-Assessment Method requires the taxpayer to compute actual liability for the month. This is more useful where turnover, liability, or ITC varies significantly month to month.

QRMP vs Monthly Filing - Comparison

QRMP reduces filing frequency, but it does not eliminate the need for monthly tax discipline. That is the part many businesses miss. Quarterly filing does not mean quarterly tax payment.

IFF - Invoice Furnishing Facility for QRMP Taxpayers

IFF, or Invoice Furnishing Facility, allows QRMP taxpayers to upload selected B2B invoice details for the first and second months of the quarter without waiting for the quarterly GSTR-1.

This exists because, under pure quarterly filing, a customer may otherwise have to wait until quarter-end to see the supplier's invoice reflected in the system. IFF helps avoid that delay for B2B transactions and supports more timely ITC visibility for recipients.

IFF Key Rules

IFF vs GSTR-1 Timeline Example

Invoices furnished through IFF are carried into the quarterly reporting cycle and should not be duplicated as fresh entries.

GST Return Due Dates - FY 2025-26 Calendar

GSTR-1 Due Dates

Monthly filers

Monthly GSTR-1 is generally due on the 11th of the following month.

Quarterly GSTR-1 filers under QRMP

Quarterly GSTR-1 is generally due on the 13th of the month following the quarter.

These timelines are part of the regular GSTR-1 filing pattern, though the government can extend due dates through notifications in specific situations.

GSTR-3B Due Dates

Monthly GSTR-3B filers

For regular monthly filers, GSTR-3B is generally due on the 20th of the following month across India.

Quarterly GSTR-3B under QRMP

For QRMP taxpayers, the quarterly GSTR-3B due date is split by State or Union Territory.

Category I States and UTs - 22nd after quarter
Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, the Union Territories of Daman and Diu and Dadra and Nagar Haveli, Puducherry, Andaman and Nicobar Islands, and Lakshadweep.

Category II States and UTs - 24th after quarter
Himachal Pradesh, Punjab, Uttarakhand, Haryana, Rajasthan, Uttar Pradesh, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, West Bengal, Jharkhand, Odisha, Jammu and Kashmir, Ladakh, Chandigarh, and Delhi.

The 22nd and 24th split applies to QRMP quarterly GSTR-3B, not to regular monthly GSTR-3B.

Annual and Other Return Due Dates

ITC-04 Due Dates

ITC-04 is not uniform for everyone.

• Taxpayers with annual aggregate turnover above ₹5 crore in the preceding financial year file ITC-04 half-yearly.
• Taxpayers with annual aggregate turnover up to ₹5 crore file ITC-04 annually.

For businesses above ₹5 crore, the common half-yearly due dates are:

• 25 October for April to September
• 25 April for October to March

GSTR-2A vs GSTR-2B - Key Difference Explained

GSTR-2A and GSTR-2B are both inward supply statements, but they serve different purposes.

GSTR-2B is the stronger operational document for ITC decisions because it is fixed for the tax period. GSTR-2A remains useful, especially for follow-up with vendors and live reconciliation, but it is less reliable for month-end filing decisions.

Practical Example

If a supplier files the October 2025 invoice details before the cut-off relevant for the October 2025 GSTR-2B cycle, the invoice can appear in the October 2B. If the supplier files after that cut-off, it may flow to the next period's 2B instead. This is why vendor follow-up timing matters, especially near month-end and return due dates.

How to File GST Returns Online

The normal filing process usually follows this order:

1. Log in to the GST portal using GSTIN and password.
2. Go to Services -> Returns -> Returns Dashboard.
3. Select the relevant financial year and tax period.
4. Prepare and file GSTR-1 or IFF, where applicable.
5. Open GSTR-3B for the same period.
6. Review outward liability, inward ITC, exempt supplies, and tax payable.
7. Pay tax using the electronic credit ledger and electronic cash ledger.
8. File using DSC or EVC.
9. Save the ARN and acknowledgment.

In practice, many businesses generate JSON files or reconciliation reports through GST or accounting software before uploading or filing. Portal auto-population can help, but taxpayers are still responsible for reviewing the figures and ensuring that what is filed matches books, supporting documents, and the return rules.

A good filing process is not just about submission. It should also include:

• review of credit notes and debit notes,
• vendor follow-up on missing ITC,
• comparison of GSTR-1 vs books,
• comparison of GSTR-3B vs liability register,
• and preservation of ARN and working papers.

How to File a Nil GST Return

A nil GST return is mandatory where a registered taxpayer is required to file a return for the period but has no reportable transactions.

Method 1 - Through the GST Portal

• Log in to the portal.
• Open the Returns Dashboard.
• Select the period.
• Choose the relevant return.
• Use the nil-filing option where available.
• Submit and file using EVC or DSC.

Method 2 - Through SMS

Nil GSTR-1 and nil GSTR-3B can be filed by SMS through 14409 from the mobile number registered on the GST portal.

Nil GSTR-1 format
NIL R1 GSTIN TAXPERIOD

Nil GSTR-3B format
NIL 3B GSTIN TAXPERIOD

After sending the SMS, the taxpayer receives an OTP-based confirmation flow. The format must be correct, and the GSTIN must be eligible for nil filing for that period.

Zero activity does not remove the filing obligation. That is why nil return discipline matters, especially for dormant but active registrations.

How to Amend a Filed GST Return

A filed GST return cannot be directly edited. Corrections are normally made in a later tax period through the relevant amendment sections in GSTR-1.

The practical logic is:

• B2B invoice mistakes are corrected through the amendment section for B2B invoices,
• credit and debit note mistakes are corrected through the related note amendment section,
• B2C corrections use the relevant B2C amendment section,
• advance-related mistakes are corrected through the appropriate advance adjustment sections.

Steps to Amend

1. Open the current period's GSTR-1.
2. Go to the relevant amendment section.
3. Enter the original document reference and tax period.
4. Enter the corrected details.
5. File the current period return.

Amendment Window

Under the current law, many corrections and ITC-related cut-offs are now linked to 30 November of the following financial year or furnishing of the annual return, whichever is earlier. The exact implication depends on the type of correction involved.

Who files what for FY 2025-26?

The simplest way to understand this is::

• taxpayers above the GSTR-9 exemption threshold for the relevant year generally file GSTR-9,
• taxpayers above ₹5 crore aggregate turnover generally file both GSTR-9 and GSTR-9C,
• smaller taxpayers should still check the year-specific exemption notifications because GSTR-9 applicability has often been relaxed for taxpayers up to ₹2 crore in prior years.

The key takeaway is that the threshold for GSTR-9C has remained relatively stable, while the applicability of GSTR-9 for smaller taxpayers may still depend on annual exemption notifications.

ITC Reconciliation Using GSTR-2B

Monthly ITC reconciliation is one of the most practical GST controls a business can maintain.

Step 1 - Download GSTR-2B

Download the GSTR-2B statement for the relevant tax period from the GST portal.

Step 2 - Export the Purchase Register

Export the purchase register for the same tax period from the accounting system.

Step 3 - Match Key Fields

Match invoice by invoice using:

• supplier GSTIN,
• invoice number,
• invoice date,
• taxable value,
• GST amount.

Step 4 - Classify Differences

Step 5 - Claim Eligible ITC Carefully

Claiming ITC should be based on legal eligibility and reconciliation, not on a single data source. GSTR-2B is a strong period-wise working tool, but businesses should still verify the validity of documents, receipt of goods or services, blocked credit rules, and vendor compliance.

Step 6 - Track Unmatched Items

Where the supplier later files or corrects the document and it appears in a future GSTR-2B, the recipient can review claim eligibility in that later period, subject to the applicable annual time limit.

A disciplined 2B reconciliation process reduces notice risk, improves vendor discipline, and protects ITC during scrutiny.

This is usually where manual review becomes slow, especially when vendor follow-up and mismatch tracking start piling up. GSTR reconciliation software helps teams identify exceptions faster and act on them before filing pressure builds.

Late Fee and Penalty Structure

Late Fee for Delayed Filing

A late fee under Section 47 is prescribed for delayed filing of returns. The statute provides the framework, while notifications and relief measures may cap or reduce the effective amount for certain forms, taxpayer classes, or nil returns.

The broad framework commonly used in practice is:

But the maximum cap can vary depending on the return type, turnover bracket, and notification-based relief for the period. That is why businesses should verify the actual cap applicable to the form and year, rather than relying on a single universal table.

Interest on Unpaid Tax

The principle that interest on delayed tax payment applies only on the net cash tax liability rather than the gross tax position is an important relief point for taxpayers with sufficient ITC.

Example

If ₹50,000 of net cash tax is paid 30 days late at 18% interest, the interest works roughly as:

₹50,000 × 18% × 30/365 = about ₹739

This is why return delay and tax delay are not the same issue. A taxpayer may face:

• late fee for late filing,
• interest for delayed tax payment,
• and sometimes both together.

Consequences of Not Filing GST Returns

1. E-Way Bill Blocking

Continuous non-filing can lead to e-way bill blockage , disrupting the movement of goods and creating immediate operational problems. This usually hurts businesses long before formal cancellation proceedings begin.

2. Recipient's ITC Disruption

If a supplier does not furnish outward supply details properly, the recipient may not see those invoices correctly reflected in the inward statement ecosystem. That delays reconciliation and creates friction with ITC.

3. GST Registration Cancellation

Under Section 29(2)(c), registration can be cancelled for continuous non-filing.

Broadly:

• monthly filers face cancellation risk after prolonged consecutive non-filing,
• quarterly filers can also face cancellation proceedings after repeated default over prescribed tax periods.

The cancellation process is not always immediate, but sustained non-compliance significantly increases the risk.

4. Best Judgment Assessment

Where returns remain unfiled, the proper officer may proceed under the best-judgment framework based on available information. That means the department may estimate liability unless the taxpayer regularises the position within the allowed time.

5. Scrutiny and Notices

Repeated mismatch between GSTR-1, GSTR-3B, books, and inward supply data can trigger scrutiny, explanation requests, and in some cases further proceedings.

The most practical takeaway is simple: non-filing rarely stays a portal issue. It usually turns into a problem involving taxes, logistics, vendors, and registration all at once.

How to Download GST Returns

Filed returns and GST statements can generally be downloaded from the GST portal through the Returns Dashboard and related menus.

Filed Returns

• Go to Services -> Returns -> View Filed Returns
• Select year, period, and return type
• Download PDF, Excel, or other available format

GSTR-2B

• Go to the GSTR-2B section
• Select the period
• Download Excel or JSON depending on the need

GSTR-2A

• Go to the GSTR-2A section
• Select the relevant period
• Download for reconciliation and vendor follow-up

ARN / Filing Acknowledgment

• Use the return tracking function
• Enter the ARN
• Download confirmation if needed

Downloading and preserving returns matters because filing alone is not enough. Businesses should also keep:

• the filed return copy,
• ARN acknowledgment,
• tax payment challan trail,
• reconciliation workings,
• and supporting ledgers.

Conclusion

GST return compliance in India becomes much easier when the filing framework is understood clearly.

The key principles are:

• GSTR-1 is for outward supply reporting.
• GSTR-3B is the summary return used to declare liability, ITC, and tax payment.
• QRMP reduces filing frequency, but it does not remove the monthly tax payment.
• GSTR-2B is the stronger period-wise ITC working statement.
• Nil returns still need to be filed on time.
• Delayed filing can create late fees, interest, e-way bill blockage, scrutiny, and cancellation risk.
• Annual return and reconciliation requirements depend on the taxpayer category, turnover, and any year-specific exemption notifications.

For businesses using GST software , the real value is not just JSON generation. It is disciplined return preparation, 2B reconciliation, document tracking, and timely filing. That is what actually reduces compliance risk.