Filing GST returns correctly and on time is more than just a compliance requirement; it has a direct impact on your input tax credit, your buyer’s credit claims, and your company’s position with the tax department. Sharda Associates, a Bhopal-based CA-led financial consultancy, has helped thousands of businesses through GST compliance and delivered over 45,500 CA-certified reports at a clear ₹2,999. This article explains exactly how to file GST returns via the official portal, including due dates and typical difficulties.

Key Takeaways

• The two main monthly/quarterly returns are GSTR-1 (sales details) and GSTR-3B (tax summary plus payment).
• GSTR-1 is due on the 11th (monthly) or the 13th following the quarter (QRMP); GSTR-3B is due on the 20th / 22nd-24th.
• Since July 2025, GSTR-3B sales data are non-editable. Correct errors with GSTR-1A first. Late fees are ₹50/day (₹20/day for Nil), with a maximum of ₹5,000, plus 18% p.a. Interest on delinquent taxes.
• QRMP program is offered for turnover up to ₹5 crore, requiring quarterly GSTR-1 and monthly tax payments via PMT-06.

Types of GST Returns You Need to File

Most regular taxpayers deal primarily with two returns each period, though the full GST return system covers several categories depending on business type.

GSTR-1 records invoice-level sales facts and feeds them into your purchasers’ input tax credit, whereas GSTR-3B is used to self-assess and pay the real tax amount. Businesses under the QRMP scheme (with a turnover of up to ₹5 crore) can file GSTR-1 quarterly while paying tax monthly using Form PMT-06.

Aside from these core returns, specific categories of taxpayers have their own obligations: GSTR-5 for non-resident taxable persons, GSTR-5A for OIDAR service providers, GSTR-6 for input service distributors, GSTR-7 for entities deducting TDS under GST, and GSTR-8 for e-commerce operators collecting TCS. Most small and medium-sized firms will only need to deal with GSTR-1 and GSTR-3B, but bigger entities with cross-border transactions, job work arrangements, or e-commerce operations should determine if additional returns apply to their particular business model.

Step-by-Step Process to File GST Return Online

Whether it’s GSTR-1 or GSTR-3B, the filing process on the GST portal follows a consistent pattern:

Since the July 2025 tax period, auto-populated sales statistics in GSTR-3B (Tables 3.1 and 3.2) are no longer editable immediately; any change must be made through GSTR-1A before GSTR-3B is filed, making proper GSTR-1 filing more crucial than ever.

This shift means that the prior practice of “fixing errors later in GSTR-3B” is no longer valid. If a sales figure was incorrectly reported in GSTR-1, the repair must flow through GSTR-1A for the same period before the GSTR-3B window closes, and there is no time limit on how late GSTR-1A can be filed relative to GSTR-3B submission. Businesses who reconcile their books with GSTR-1 drafts before the 11th of the month, rather than after, avoid the scramble entirely and file cleaner reports the first time.

Due Dates and Late Fees to Watch

Missing GST return deadlines trigger both late fees and interest and can block your ability to file subsequent periods’ returns.

QRMP-scheme enterprises in Category 1 states (including Madhya Pradesh) must file quarterly GSTR-3B by the 22nd, while Category 2 states have a deadline of the 24th. Regardless of the scheme, any overdue tax must be paid monthly using PMT-06 to prevent interest.

The government occasionally extends due dates through official CBIC notifications, usually in reaction to portal downtime or technological issues, as was the case with the March 2026 GSTR-3B deadline, which was moved back by one day. Businesses should, however, treat the usual schedule as the default and check the GST portal directly rather than assuming an extension will apply, as such relief is not guaranteed for every filing period and is often limited to specific states or taxpayer categories.

Why Choose Sharda Associates

• CA-certified team handles GSTR-1, GSTR-3B, GSTR-9, and GSTR-9C filings, delivering over 45,500 project reports and compliance papers across India.
• Pricing is affordable and clear, with typical project reports starting at ₹2,999.
• Proactive reconciliation of GSTR-1, GSTR-2B, and GSTR-3B to avoid ITC imbalances.
• Timely filing reminders to ensure you never miss a deadline or pay late fines.
• Comprehensive help, from GST registration to annual return filing, all under one roof.

Conclusion

Timely and accurate GST return filing is critical for maintaining compliance, protecting Input Tax Credit (ITC) eligibility, and avoiding late fines, penalties, and notices from the GST authorities. Regular filing also improves your company’s financial integrity, ensures seamless operations, and facilitates easy loan and subsidy applications.

Sharda Associates provides expert support with GST registration, GST return filing, GST reconciliation, tax compliance, and CA-certified project reports to businesses in India. Our skilled staff provides accurate, timely, and fully compliant GST solutions, with over 45,500 successful reports and professional services starting at ₹2,999. Call us today at 8989977769 for dependable GST return submission and comprehensive tax compliance assistance.

Frequently Asked Questions

1. What is the distinction between GSTR-1 and GSTR-3B? 

GSTR-1 provides full invoice-level sales data, whereas GSTR-3B is a summary return that assesses and pays the actual tax amount.

2. What is the GSTR-3B due date in 2026? 

Monthly filers must file GSTR-3B by the 20th of the next month, whereas QRMP filers must file by the 22nd or 24th, depending on their state.

3. Can I file a GST return without first paying the tax? 

No, GSTR-3B cannot be filed unless the tax liability listed on the return is cleared using an electronic cash or credit ledger.

4. What happens if the GSTR-1 is filed late? 

Late submission of GSTR-1 incurs a late fee and may impede your buyers’ ability to claim appropriate input tax credit via GSTR-2B.

5. Is DSC required for filing GST returns? 

DSC is required for corporations and LLPs, while other taxpayers can submit using EVC via an OTP provided to their registered mobile number.

6. What is the QRMP scheme? 

QRMP enables enterprises with a turnover of up to ₹5 crore to file GSTR-1 and GSTR-3B quarterly while paying tax monthly using Form PMT-06.

7. Can I correct errors in GSTR-3B after filing? 

Because auto-populated sales data cannot be edited, errors in outbound supply statistics must now be addressed through GSTR-1A before the next GSTR-3B filing.

8. What is GSTR-9, and who is required to file it? 

GSTR-9 is the yearly return that consolidates a financial year’s GST filings. It is essential for taxpayers with a revenue above ₹2 crore.

9. How is interest computed for late GST tax payments? 

The outstanding tax amount is subject to an annual interest rate of 18%, computed from the day following the due date until actual payment.