GST return filing helps registered dealers report transactions, claim eligible input tax credit and pay the tax due. This guide explains why filing matters, which returns apply to different dealers, their usual due dates and the steps to follow during each filing cycle.
Why should we file GST returns?
What does a GST-registered dealer achieve by filing returns?
GST return filing helps a dealer report sales, claim eligible input tax credit and pay the tax due. It also helps the dealer’s registered customers claim eligible credit on their purchases.
For example, when a manufacturer sells taxable goods to a distributor, the manufacturer charges GST and reports the invoice details in GSTR-1. These details appear in the distributor’s GSTR-2B according to the applicable reporting rules. The manufacturer pays the applicable tax liability through GSTR-3B after adjusting eligible input tax credit.
The distributor can claim credit on the purchase, subject to the conditions under GST law. The same process continues when the distributor sells to a registered retailer.
Why does the Government require GST returns?
GST operates primarily through self-assessment. Registered dealers calculate their tax liability, claim eligible input tax credit, pay the tax due and submit the prescribed returns.
Returns give the Government information about sales, tax liability, input tax credit and payments. This information helps the department verify compliance, identify discrepancies and take action where necessary.
Because a buyer’s input tax credit depends partly on the supplier’s correct reporting, the system also encourages businesses throughout the supply chain to comply.
Types of GST returns, their purpose and due dates
The returns a dealer must file depend on the registration type and filing frequency. The tables below cover the main filings for regular and composition dealers.
1. Regular dealers
Regular dealers file either monthly or quarterly under the QRMP scheme — Quarterly Return and Monthly Payment.
Monthly filing
| Return | Purpose | Usual due date |
|---|---|---|
| GSTR-1 | Reports sales and invoice details, helping registered buyers claim eligible input tax credit. | 11th of the following month |
| GSTR-3B | Reports tax liability, claims eligible input tax credit and pays the balance tax due. | 20th of the following month |
Quarterly filing under QRMP
Eligible regular dealers with aggregate annual turnover up to ₹5 crore can choose quarterly returns with monthly tax payments. Confirm eligibility and the filing frequency selected for your GSTIN on the portal.
| Return or facility | Purpose | Usual due date |
|---|---|---|
| GSTR-1 | Reports sales and invoice details for the quarter. | 13th of the month following the quarter |
| GSTR-3B | Reports the quarter’s tax liability and eligible input tax credit, and settles the balance tax. | 22nd of the month following the quarter for Tamil Nadu; 22nd or 24th in other States, depending on location |
| PMT-06 — payment challan | Makes the required tax payment for the first two months of the quarter. It is a payment form, not a return. | 25th of the following month, where payment is required |
| IFF — optional Invoice Furnishing Facility | Reports invoices issued to registered buyers during the first two months of the quarter, helping buyers receive invoice details earlier for claiming eligible input tax credit. | 13th of the following month |
IFF is optional. Dealers who do not use it report those invoices in quarterly GSTR-1. Invoices already reported through IFF need not be reported again.
For both monthly and quarterly filers, GSTR-1A provides an optional facility to correct current-period sales details after filing GSTR-1 and before filing the corresponding GSTR-3B. It becomes available after GSTR-1 is filed or its due date, whichever is later.
Check the official QRMP filing-frequency guidance.
Annual filings for regular dealers
The turnover limits below refer to aggregate turnover across registrations under the same PAN.
| Annual filing | Applicable dealers | Purpose | Usual due date |
|---|---|---|---|
| GSTR-9 | Regular dealers with annual aggregate turnover above ₹2 crore, subject to applicable exclusions | Summarises the financial year’s transactions, input tax credit and tax payments. | 31 December following the financial year |
| GSTR-9C | Regular dealers with annual aggregate turnover above ₹5 crore, subject to applicable exclusions | Reconciles the annual GST return with the financial statements. | 31 December following the financial year, along with GSTR-9 |
The exemption from GSTR-9 for aggregate turnover up to ₹2 crore applies from FY 2024–25 onwards under the current notification.
2. Composition dealers
Composition dealers follow a separate filing system and do not normally file GSTR-1 or GSTR-3B.
| Return or statement | Purpose | Usual due date |
|---|---|---|
| CMP-08 | Declares and pays the tax due for the quarter. | 18th of the month following the quarter |
| GSTR-4 | Reports the financial year’s business details and tax liability. | 30 June following the financial year, from FY 2024–25 onwards |
3. Other special categories
Separate returns apply to special registrations, including Input Service Distributors, GST tax deductors, e-commerce operators collecting tax and non-resident taxpayers. Their filing requirements depend on the registration category.
These are the usual deadlines. Check the GST portal for any extension applicable to the filing period or location.
Monthly or quarterly GST filing: which is suitable?
This choice applies to regular dealers who are eligible for QRMP. Composition dealers follow their separate filing system. Regular dealers above the ₹5 crore eligibility limit must generally file monthly.
The better choice depends on the number of invoices, customer expectations and how closely you want to review the accounts each month.
| Practical factor | Monthly filing | Quarterly filing under QRMP |
|---|---|---|
| When GSTR-1 and GSTR-3B will be filed | GSTR-1 and GSTR-3B are filed every month. | GSTR-1 and GSTR-3B are filed once each quarter, reducing the frequency of the main returns. |
| How GST input tax credit will be passed to the customers | Monthly sales reporting helps customers receive invoice details regularly. | Optional IFF can report registered-customer invoices in the first two months. Without IFF, those customers may wait for quarterly GSTR-1. |
| GST Payment frequency. | Tax is settled through monthly GSTR-3B. | Monthly payment may still be required for the first two months; the quarter is settled through GSTR-3B. |
| Additonal Reconcillation tasks | Monthly reconciliation can help identify missing invoices and differences earlier. | Monthly bookkeeping is still needed. Leaving everything until quarter-end can make reconciliation harder. |
| Main disadvantage | More frequent filing deadlines and preparation work. | IFF and monthly payments can reduce the expected workload saving; unresolved differences may accumulate at quarter-end. |
Example 1: Retailer mainly selling to consumers
A Chennai shop has annual aggregate turnover of ₹60 lakh and mainly sells to unregistered customers. If eligible, QRMP may suit the business because there is little need to report customer invoices through IFF. The shop must still maintain monthly records and make the required monthly tax payments based on QRMP monthly tax payment.
Example 2: Distributor supplying registered businesses
A distributor has annual aggregate turnover of ₹3 crore and supplies many registered dealers who expect timely invoice reporting. Monthly filing may be easier to manage because sales reporting and reconciliation follow the same monthly cycle. QRMP is also possible if eligible, but the distributor may need to use IFF consistently for the first two months.
Example 3: Consultant with a few business invoices
A consultant with annual aggregate turnover of ₹40 lakh issues only a few invoices each month to registered companies. QRMP with optional IFF may be manageable: invoices are reported monthly where needed, while the main returns are filed quarterly. The advantage depends on whether the smaller invoice workload makes IFF practical.
These examples are illustrative. Quarterly return filing does not mean that tax needs to be paid only once every three months.
GST filing workflow for regular and composition dealers
Follow the sequence that matches your registration and filing frequency. The dates below are the usual dates, subject to notified extensions.
Regular dealers filing monthly
- Prepare your records: Check the month's sales, purchases and adjustments.
- File GSTR-1 by the 11th of the following month.
- Review GSTR-2B, normally available on the 14th of the following month: Compare supplier-reported invoices with your purchase records.
- Follow up with suppliers: Ask them to report missing invoices or correct differences promptly. Track late-reported invoices in the next eligible GSTR-2B period.
- Reconcile and file GSTR-3B by the 20th: Complete applicable IMS checks, recompute GSTR-2B where required, claim eligible credit and pay the balance tax. Save the filed return and acknowledgement.
Example: For April, file GSTR-1 by 11 May, review GSTR-2B from 14 May, and pay and file GSTR-3B by 20 May. Supplier follow-up can begin earlier; do not delay filing while waiting for missing invoices.
Regular dealers filing quarterly under QRMP
- Maintain records and follow up with suppliers every month.
- Use optional IFF for the first two months, where needed: Furnish registered-customer invoice details by the 13th of the following month.
- Make required monthly payments: Use PMT-06 by the 25th of the following month for the first two months, where payment is required.
- File quarterly GSTR-1 by the 13th of the month following the quarter: Do not repeat invoices already furnished through IFF.
- Review quarterly GSTR-2B, normally available on the 14th of that month: Reconcile purchases and complete the necessary IMS checks.
- Pay the remaining tax and file quarterly GSTR-3B: Account for payments already made. The usual deadline is the 22nd of the month following the quarter for Tamil Nadu GST registration.
Composition dealers
- Maintain monthly sales and purchase records and calculate the applicable tax.
- Pay and file quarterly CMP-08 by the 18th of the month following the quarter.
- Reconcile annual records and file GSTR-4 by 30 June following the financial year, from FY 2024–25 onwards.
Composition dealers cannot claim input tax credit and not required to follow the GSTR-1/GSTR-3B filing cycle.
What should you check before filing GSTR-1?
GSTR-1 reports sales and invoice details. Before filing, compare the records with your sales register and check:
- Registered buyers: Verify the buyer’s GSTIN, invoice number, date, taxable value and tax amounts.
- Unregistered buyers: Report intra-State sales and interstate invoices up to ₹1 lakh in the appropriate consolidated categories. Interstate invoices above ₹1 lakh require invoice-level reporting in the B2C Large category.
- Other supplies: Include applicable exports, exempt supplies, nil-rated supplies and non-GST supplies.
- Adjustments: Check credit notes, debit notes, amendments and taxable advances where applicable.
- HSN/SAC summary: Check the required code details using aggregate annual turnover in the preceding financial year. The minimum reporting requirement is generally four digits up to ₹5 crore and six digits above ₹5 crore.
- Completeness: Check the document summary and ensure that invoices already reported through IFF are not duplicated.
Invoice details are reported; copies of every invoice do not ordinarily need to be uploaded with GSTR-1. Draft entries can be corrected before filing.
For previous-year sales details, the correction deadline is generally 30 November following the financial year or the date of filing the relevant annual return, whichever is earlier.
What are GSTR-2A and GSTR-2B?
GSTR-2A and GSTR-2B are statements to review, not returns to file.
| Statement | How it helps |
|---|---|
| GSTR-2A | Provides a changing view of purchase-related information reported through the relevant GST filings. |
| GSTR-2B | Provides the period’s auto-drafted input tax credit information for reconciliation with purchases and GSTR-3B. |
Review purchases against GSTR-2B, investigate missing invoices and complete applicable Invoice Management System actions. GSTR-2B may need to be recomputed after those actions and before GSTR-3B is filed.
An invoice appearing in GSTR-2B does not by itself make the credit eligible. Check the purchase documents, receipt of goods or services, restrictions and any reversals required. Read more about GST input tax credit and its calculation.
What should you check before filing GSTR-3B?
Before filing GSTR-3B:
- Compare sales and tax liability with GSTR-1 and any GSTR-1A corrections.
- Reconcile purchase records with GSTR-2B and claim only eligible input tax credit.
- Check reverse-charge tax and required credit reversals separately.
- Confirm the tax payable after using eligible credit and the cash balance needed.
- Download and review the draft summary, complete filing and save the acknowledgement and filed return.
Do not rely only on auto-populated figures. Investigate differences before submitting the return.
No sales does not automatically mean a nil GSTR-3B. Purchases, reverse-charge tax or other liabilities may still require entries. Continue filing applicable returns while registration is active, even if there is no business activity. If you need help with GST nil filing, first check whether the conditions for a nil return are satisfied.
Other important points about GST return filing
Non-filing and cancellation
Regular monthly filers who do not file returns for six continuous months may face cancellation proceedings. For QRMP filers, the corresponding period is two continuous quarters. Composition dealers may face cancellation where their annual return remains unfiled beyond three months from its due date.
Cancellation is not automatic merely because a deadline has passed. If business has closed, deal with the outstanding filing obligations and the appropriate GST cancellation process.
Corrections after filing
A filed GSTR-3B cannot be revised. GSTR-1A allows certain current-period sales corrections before the corresponding GSTR-3B is filed; other corrections may need to be reported in later returns within the permitted time. Checking before GST return filing helps avoid these complications.
Interest and late fees
For an ordinary delayed GST return, interest is generally charged at 18% per year on the net tax payable in cash after eligible input tax credit.
If sufficient cash was deposited by the due date and remained available until used to pay that return’s tax, no interest applies to that amount merely because the return was filed late. Depositing money after the due date does not automatically stop interest. Separate treatment can apply to other defaults, including wrongly claimed and utilised credit.
Late fees may still apply even where no interest is due. Check the applicable daily rate, maximum amount and any notified relief for the return period.
First return after GST registration approval
Before filing your first return, check the effective date of GST registration shown on your certificate. Include the applicable transactions from that date, even if the certificate was issued later. Do not assume filing starts only from the approval date.
After online GST registration, confirm the filing frequency, first return period and transactions to include.
Pending returns after cancellation by the department
If registration was cancelled for non-filing, address the pending returns and applicable dues when seeking restoration or fresh registration. A new GST number does not remove the old obligations, and unresolved defaults can lead to rejection of a fresh application.
Where applicable, file the final return, GSTR-10, within three months of the cancellation date or cancellation order date, whichever is later. GSTR-10 is separate from pending regular returns and does not replace them. If you are restoring the old registration, follow the restoration process rather than treating it as permanent closure.
What are the benefits of GST filing?
Correct and timely filing keeps the credit chain working. Missing invoices, incorrect details or delayed filing can delay the customer’s credit and create additional work. Regular filing therefore helps a dealer meet tax obligations and maintain customer confidence.
Its practical benefits include:
- Claiming eligible credit: Reconciliation helps identify eligible input tax credit and invoices that need follow-up.
- Helping customers claim credit: Correct sales reporting helps registered customers receive the invoice details needed for their claims.
- Avoiding unnecessary costs: Timely filing and payment help avoid late fees and interest arising from delay.
- Reducing compliance problems: Regular filing reduces the risk of notices and cancellation proceedings caused by non-filing.
- Keeping records consistent: Comparing returns with accounts helps identify missing invoices, incorrect calculations and differences early.
Filing alone does not make every purchase eligible for input tax credit. Accurate records and fulfilment of the applicable conditions remain essential.
Related guides
- GST Input Tax Credit: Meaning and Calculation
- What Happens If a GST Return Is Filed Incorrectly?
- What to Do After GST Registration
Need help with GST return filing?
See our GST return filing service in Chennai or speak with our team about your filing requirements.