GST Return Filing Process

GST Return Filing Process in India – Complete Guide

Table of Contents:-

GST return filing is one of the principal ongoing compliance requirements for businesses registered under the Goods and Services Tax regime in India.

A GST-registered business may be required to periodically report outward supplies, input tax credit, tax liability, tax payments and other prescribed information through the GST portal.

For regular taxpayers, Form GSTR-1 and Form GSTR-3B are among the most important periodic GST filings. Smaller eligible taxpayers may also opt for the Quarterly Return Monthly Payment (QRMP) Scheme, subject to prescribed conditions.

GST return filing should not be treated merely as uploading figures on the GST portal. Proper filing requires reconciliation between accounting records, invoices, e-invoices, input tax credit data, electronic ledgers and tax payments.

For comprehensive assistance covering GST registration, return filing, input tax credit, refunds, assessments and litigation, visit our GST & Indirect Tax Advisory Services in India.

Businesses can file GST returns through the official GST Portal.

What Is a GST Return?

A GST return is an electronic statement through which a registered taxpayer furnishes prescribed information relating to its business transactions and GST liability.

Depending on the type of taxpayer and applicable return, information may include:

  • outward taxable supplies;
  • zero-rated supplies;
  • exempt and nil-rated supplies;
  • debit notes and credit notes;
  • input tax credit;
  • reverse-charge transactions;
  • tax payable;
  • tax paid; and
  • other prescribed particulars.

Section 39 of the CGST Act contains the principal statutory framework for furnishing GST returns. The applicable provisions can be referred to through the CBIC CGST Act.

Main GST Returns for Regular Taxpayers

For most regular taxpayers, the periodic GST compliance cycle primarily revolves around:

  • GSTR-1 – details of outward supplies;
  • GSTR-1A – facility for specified additions or corrections for the current tax period after filing GSTR-1 and before GSTR-3B;
  • GSTR-3B – summary return containing tax liability, eligible ITC and tax payment;
  • GSTR-2B – auto-generated input tax credit statement used for ITC reconciliation; and
  • GSTR-9 – annual return, where applicable.

The actual filing requirements depend upon registration type, turnover, nature of business and applicable exemptions.

GST Return Filing Process at a Glance

A practical monthly GST return process generally involves:

  1. Close the books for the tax period.
  2. Reconcile sales invoices.
  3. Review credit and debit notes.
  4. Reconcile e-invoice data, where applicable.
  5. Reconcile e-way bill data, where relevant.
  6. Prepare and file GSTR-1.
  7. Review GSTR-1A, if any current-period corrections are required.
  8. Download and review GSTR-2B.
  9. Reconcile purchase register with GSTR-2B.
  10. Determine eligible and ineligible ITC.
  11. Calculate output GST liability.
  12. Review reverse-charge liability.
  13. Prepare GSTR-3B.
  14. Utilise available ITC.
  15. Pay balance GST through the electronic cash ledger.
  16. File GSTR-3B.
  17. Download acknowledgement and maintain records.
  18. Reconcile the filed returns with books.

This sequence helps reduce discrepancies between outward supplies, ITC and tax payments.

Step 1 – Finalise Books of Account

Before preparing GST returns, the accounts for the relevant month or quarter should be reasonably complete.

Businesses should review:

  • sales invoices;
  • purchase invoices;
  • debit notes;
  • credit notes;
  • advances;
  • exports;
  • imports;
  • branch transfers;
  • reverse-charge transactions;
  • stock movements; and
  • other GST-sensitive entries.

The return should ideally be prepared from reconciled books rather than from disconnected spreadsheets.

For guidance on statutory documentation, see our Accounts and Records under GST.

Step 2 – Reconcile Outward Supplies

The sales register should be reviewed before filing GSTR-1.

Important checks include:

  • invoice number;
  • invoice date;
  • customer GSTIN;
  • taxable value;
  • GST rate;
  • CGST/SGST/IGST;
  • place of supply;
  • HSN/SAC;
  • B2B/B2C classification;
  • exports;
  • SEZ supplies;
  • debit notes; and
  • credit notes.

Incorrect customer GSTIN or invoice reporting can affect the recipient’s input tax credit.

Businesses should therefore validate outward-supply data before filing.

Step 3 – Reconcile E-Invoice Data

Businesses covered by the e-invoicing mandate should reconcile their sales register with Invoice Registration Portal data.

Key checks include:

  • whether all eligible invoices have valid IRNs;
  • whether cancelled invoices are appropriately reflected;
  • taxable value;
  • GST amount;
  • recipient GSTIN;
  • invoice date; and
  • invoice number.

E-invoice information may flow into GST-return data, but businesses should still reconcile it with their accounting records before filing.

Step 4 – Reconcile E-Way Bill Data

Businesses involved in movement of goods should also compare e-way bill data with their sales and stock records.

Potential differences include:

  • e-way bill generated but invoice cancelled;
  • invoice issued but e-way bill not generated where required;
  • incorrect document number;
  • incorrect taxable value;
  • cancelled e-way bills;
  • branch transfers; and
  • delivery challan movements.

For detailed guidance, refer to our E-Way Bill under GST.

Step 5 – Prepare Form GSTR-1

GSTR-1 is the statement used by regular taxpayers to furnish details of outward supplies.

It may contain information relating to:

  • B2B supplies;
  • B2C supplies;
  • exports;
  • supplies to SEZ;
  • debit notes;
  • credit notes;
  • advances, where applicable;
  • amendments;
  • HSN-wise summary; and
  • other prescribed outward-supply information.

Invoice serial numbers are also relevant to GSTR-1 reporting under GST invoice rules. See the CBIC GST Invoice Rules.

GSTR-1 Due Date

For monthly filers, the normal due date for GSTR-1 is generally the 11th day of the succeeding month, subject to notifications or extensions.

Under the QRMP Scheme, quarterly GSTR-1 is generally due by the 13th day of the month succeeding the quarter.

Taxpayers should always check the latest due date appearing on the GST Portal because the Government may extend due dates for particular periods or categories.

Step 6 – Review Form GSTR-1A

GSTR-1A provides an important correction mechanism for the current tax period.

After filing GSTR-1, a taxpayer may use GSTR-1A to add certain records missed in GSTR-1 or amend specified records reported for the same tax period before filing GSTR-3B.

According to the GST Portal guidance, GSTR-1A may be used to:

  • add records omitted from GSTR-1; and
  • amend eligible records already reported in GSTR-1 for the same tax period.

However, it cannot generally be used to amend records pertaining to earlier tax periods; those are dealt with through subsequent GSTR-1 filings subject to the statutory time limit.

Businesses should therefore review GSTR-1 immediately after filing rather than discovering errors only after GSTR-3B has been submitted.

Step 7 – Review GSTR-2B

GSTR-2B is an auto-generated input tax credit statement available to the recipient taxpayer.

It is an important starting point for determining ITC eligibility.

Businesses should compare:

Purchase Register → Supplier Invoices → GSTR-2B → Eligible ITC

Differences should be investigated before claiming credit.

Common mismatches include:

  • invoice missing from GSTR-2B;
  • incorrect GSTIN;
  • wrong invoice number;
  • credit note reported by supplier;
  • duplicate invoice;
  • incorrect tax amount; and
  • invoice belonging to another period.

Step 8 – Invoice Management System and ITC Review

The GST ecosystem now also includes the Invoice Management System (IMS) for management of inward-supply documents.

Through IMS, recipients may be able to take actions on specified invoices, debit notes and credit notes reported by suppliers.

The GST Portal has introduced further changes to IMS from the October 2025 tax period, including functionality relating to treatment of certain credit notes and ITC reversals.

Because IMS functionality is evolving, taxpayers should review current GST Portal advisories while completing monthly ITC reconciliations.

For broader ITC assistance, refer to our GST & Indirect Tax Advisory Services in India.

Step 9 – Determine Eligible Input Tax Credit

GSTR-2B availability does not automatically mean that every amount shown should be claimed.

ITC should be examined under applicable GST law and conditions.

Businesses should consider:

  • receipt of goods or services;
  • possession of valid tax documentation;
  • supplier reporting;
  • blocked credit provisions;
  • business/non-business use;
  • exempt/taxable use;
  • reverse-charge transactions;
  • capital goods;
  • credit notes; and
  • statutory time limits.

A monthly ITC reconciliation substantially reduces the risk of excess credit claims.

Step 10 – Identify Reverse-Charge Liability

Before filing GSTR-3B, businesses should review transactions potentially covered by the Reverse Charge Mechanism.

The accounts team should identify:

  • nature of supply;
  • supplier category;
  • applicable notification;
  • taxable value;
  • GST liability;
  • payment requirement; and
  • corresponding ITC eligibility.

A separate reverse-charge ledger can be useful for businesses with recurring RCM transactions.

Step 11 – Prepare Form GSTR-3B

GSTR-3B is the principal summary return used by regular taxpayers for reporting GST liability, eligible input tax credit and payment of tax.

The taxpayer should reconcile GSTR-3B with:

  • GSTR-1;
  • GSTR-1A, where filed;
  • sales register;
  • purchase register;
  • GSTR-2B;
  • electronic credit ledger;
  • electronic cash ledger; and
  • books of account.

Material differences between GSTR-1 and GSTR-3B should be investigated before filing.

GSTR-3B Due Date

For regular monthly taxpayers, GSTR-3B is generally due on the 20th day of the succeeding month, unless a different due date or extension applies. The statutory return framework is contained in Section 39 of the CGST Act.

Under QRMP, quarterly GSTR-3B is generally due on the 22nd or 24th day of the month following the quarter, depending upon the State or Union Territory of the principal place of business.

Always verify the applicable period’s due date on the GST portal.

Step 12 – Utilise Input Tax Credit

Before making cash payment, the taxpayer should review the balances available in the electronic credit ledger.

Eligible credit may be utilised against output tax liability in accordance with the statutory utilisation rules.

Businesses should not simply utilise all available portal credit without reconciling it with:

  • books;
  • GSTR-2B;
  • ITC eligibility;
  • reversals; and
  • prior-period adjustments.

Step 13 – Pay GST Liability

Where the output tax liability exceeds available eligible credit, the balance must generally be discharged through the electronic cash ledger.

Payment may involve:

  1. generating the prescribed challan;
  2. depositing the required amount;
  3. confirming the electronic cash ledger balance; and
  4. offsetting the liability before filing.

Businesses should ensure sufficient time for payment before the return due date.

Step 14 – File GSTR-3B

After confirming the tax liability, ITC and payment position, GSTR-3B can be filed electronically through the GST portal.

Depending on the taxpayer, filing may be authenticated using the permitted electronic verification method.

After successful filing, the taxpayer should retain:

  • filing acknowledgement;
  • filed return;
  • tax-payment challan;
  • workings;
  • ITC reconciliation; and
  • supporting documentation.

Monthly vs Quarterly GST Return Filing

Not every taxpayer necessarily files GSTR-1 and GSTR-3B monthly.

Eligible smaller taxpayers may opt for the Quarterly Return Monthly Payment Scheme (QRMP).

Under QRMP:

  • GSTR-1 is filed quarterly;
  • GSTR-3B is filed quarterly; and
  • tax is generally paid monthly for the first two months through the prescribed mechanism.

The QRMP Scheme is available to eligible taxpayers having aggregate turnover up to ₹5 crore, subject to prescribed conditions.

What Is IFF under QRMP?

Eligible QRMP taxpayers can use the Invoice Furnishing Facility (IFF).

IFF allows taxpayers to furnish specified B2B invoices, debit notes and credit notes relating to the first and second months of the quarter rather than waiting until quarterly GSTR-1.

Use of IFF is optional.

It can help eligible customers receive invoice information earlier for ITC purposes.

Monthly Tax Payment under QRMP

Although QRMP taxpayers file their principal returns quarterly, tax is generally paid monthly.

For the first two months of the quarter, eligible taxpayers may deposit tax through Form GST PMT-06 in accordance with the QRMP framework.

The quarter-end liability is finally reconciled through the quarterly GSTR-3B.

Nil GST Returns

A registered taxpayer may still need to file the applicable GST return even where there are no taxable transactions during the period.

Non-filing of nil returns can affect:

  • compliance status;
  • subsequent filing;
  • late fees; and
  • registration status.

Therefore, a taxpayer should not assume that there is no filing requirement simply because no tax is payable.

Late Filing of GST Returns

Delay in GST return filing can result in statutory consequences.

Depending upon the circumstances, these may include:

  • late fees;
  • interest on delayed payment of tax;
  • restrictions on subsequent compliance;
  • GST portal filing blocks;
  • notices; and
  • registration-related consequences for prolonged non-compliance.

Taxpayers should therefore maintain a monthly GST compliance calendar.

Interest on Delayed GST Payment

Where GST remains payable beyond the applicable due date, interest may arise under the GST provisions.

Businesses should distinguish between:

  • delay in filing the return; and
  • delay in payment of tax.

The financial impact should be calculated before filing delayed returns.

Can a GST Return Be Revised?

Unlike a traditional income-tax return, GST returns generally do not operate through a simple “revised return” mechanism after filing.

Errors are ordinarily corrected through mechanisms permitted in subsequent returns/statements or through facilities such as GSTR-1A for the current tax period where applicable.

The exact correction mechanism depends upon:

  • return type;
  • nature of error;
  • tax period;
  • whether the return has been filed; and
  • statutory time limits.

This is why review before filing is important.

Common GSTR-1 Errors

Businesses frequently make errors such as:

  • incorrect customer GSTIN;
  • incorrect place of supply;
  • wrong invoice number;
  • duplicate invoices;
  • missed invoices;
  • incorrect GST rate;
  • wrong B2B/B2C classification;
  • incorrect export reporting;
  • omitted credit notes; and
  • incorrect HSN reporting.

These errors may affect both the supplier and the recipient.

Common GSTR-3B Errors

Typical GSTR-3B errors include:

  • incorrect outward taxable value;
  • mismatch with GSTR-1;
  • excess ITC claim;
  • failure to reverse ineligible ITC;
  • missed reverse-charge liability;
  • wrong tax head;
  • incorrect exempt turnover;
  • missed export turnover; and
  • failure to consider credit notes.

Businesses should prepare a documented GSTR-3B working before filing.

GST Return Filing for Manufacturers

Manufacturers generally have more complex GST reconciliation because their transactions involve:

  • raw materials;
  • production;
  • finished goods;
  • stock transfers;
  • job work;
  • scrap;
  • warehouses;
  • e-way bills; and
  • multiple suppliers.

A manufacturer should ideally reconcile:

Production Records → Stock Records → Sales Register → E-Way Bills → GSTR-1 → GSTR-3B

For a detailed discussion, see our Impact of GST on Manufacturing Sector.

GST Return Filing for Service Companies

Service businesses should pay particular attention to:

  • place of supply;
  • export of services;
  • advances where relevant;
  • reverse charge;
  • interstate services;
  • SAC classification;
  • credit notes; and
  • input-service credit.

Foreign-owned service subsidiaries operating in India should also ensure that GST returns reconcile with their accounting and transfer-pricing records.

For broader assistance for overseas businesses, refer to our India Market Entry Consulting Services.

GST Return Filing for Exporters

Exporters should ensure that GST returns correctly report:

  • export invoices;
  • zero-rated supplies;
  • LUT/Bond transactions;
  • exports with payment of tax, where applicable;
  • shipping details;
  • foreign-currency realisation information where relevant; and
  • eligible input tax credit.

Errors in return filing can delay GST refund processing.

For refund-specific assistance, refer to our GST Refund Services in India.

Also see our Tips for Uploading Documents at the Time of GST Refund.

GST Return Filing for Businesses Having Multiple GSTINs

A company operating in multiple States may have multiple GST registrations.

Each GSTIN generally has its own return-filing responsibilities.

The central finance team should therefore ensure:

  • GSTIN-wise accounting;
  • State-wise outward supply reconciliation;
  • ITC reconciliation;
  • branch-transfer reporting;
  • proper cross-charge or other applicable treatment;
  • return filing; and
  • ledger reconciliation.

Businesses should avoid preparing all-State GST returns from a single combined ledger without proper GSTIN-wise segregation.

GST Return Filing and Books of Account

The GST returns should ultimately reconcile with the financial books.

A monthly reconciliation should compare:

  • turnover as per books;
  • turnover as per GSTR-1;
  • turnover as per GSTR-3B;
  • GST payable;
  • GST paid;
  • purchase register;
  • GSTR-2B;
  • eligible ITC;
  • electronic credit ledger; and
  • electronic cash ledger.

For detailed record-keeping requirements, see our Accounts and Records under GST.

GST Annual Return and Year-End Reconciliation

Depending upon applicability, taxpayers may also have annual GST compliance requirements.

GSTR-9 is an annual return for applicable registered persons.

The GST Portal currently computes various portions of GSTR-9 using information from GSTR-1, GSTR-3B and other system data. From FY 2023-24 onwards, relevant annual-return computations also use GSTR-2B information for specified purposes.

Therefore, errors accumulated during monthly filing may become visible during year-end GST reconciliation.

Businesses should not wait until annual-return preparation to reconcile the entire year.

GST Return Filing Checklist

Before filing GSTR-1:

  • reconcile sales register;
  • validate GSTINs;
  • check place of supply;
  • review GST rates;
  • reconcile e-invoices;
  • reconcile e-way bills;
  • review credit/debit notes;
  • check exports;
  • review HSN/SAC details; and
  • verify invoice numbering.

Before filing GSTR-3B:

  • reconcile GSTR-1/GSTR-1A;
  • download GSTR-2B;
  • reconcile purchase register;
  • identify eligible ITC;
  • reverse ineligible ITC;
  • review IMS actions where applicable;
  • identify RCM liability;
  • calculate output tax;
  • verify electronic ledgers;
  • make tax payment; and
  • perform final review.

Best Practices for GST Return Compliance

Businesses should implement a documented GST compliance process.

Good practices include:

  • monthly closing deadlines;
  • maker-checker controls;
  • automated invoice validation;
  • GSTIN master verification;
  • HSN/SAC master controls;
  • e-invoice reconciliation;
  • e-way bill reconciliation;
  • purchase-to-GSTR-2B reconciliation;
  • IMS review;
  • ITC eligibility review;
  • tax-payment approval;
  • return filing checklist;
  • archive of filed returns; and
  • periodic GST health checks.

GST Return Filing and Departmental Scrutiny

GST return data is available electronically to the tax authorities.

Differences between:

  • GSTR-1;
  • GSTR-3B;
  • GSTR-2B;
  • e-invoices;
  • e-way bills;
  • financial statements; and
  • income-tax information

can result in queries or departmental proceedings.

Taxpayers should therefore investigate differences before they become recurring mismatches.

For assistance with departmental verification, refer to our GST Audit Services in India.

Frequently Asked Questions on GST Return Filing

Which GST returns are filed by regular taxpayers?

Regular taxpayers commonly file GSTR-1 for outward supplies and GSTR-3B for summary tax liability, ITC and payment, subject to their applicable filing frequency and other statutory requirements.

What is GSTR-1?

GSTR-1 is the statement containing prescribed details of outward supplies made during the tax period.

What is GSTR-3B?

GSTR-3B is a summary GST return used to report tax liability, input tax credit and tax payment.

What is GSTR-2B?

GSTR-2B is an auto-generated ITC statement that assists recipients in reconciling supplier-reported invoices and determining input tax credit.

What is GSTR-1A?

GSTR-1A allows specified additions or corrections relating to the current tax period after GSTR-1 has been filed and before GSTR-3B is filed.

What is the QRMP Scheme?

QRMP stands for Quarterly Return Monthly Payment.

Eligible taxpayers with aggregate turnover up to ₹5 crore may opt to file GSTR-1 and GSTR-3B quarterly while paying tax monthly, subject to applicable conditions.

What is IFF?

IFF stands for Invoice Furnishing Facility.

It enables eligible QRMP taxpayers to furnish specified B2B documents for the first two months of a quarter. Use of IFF is optional.

What is the normal GSTR-1 due date?

For monthly filers, GSTR-1 is generally due on the 11th of the following month. Quarterly GSTR-1 under QRMP is generally due on the 13th of the month following the quarter, subject to extensions.

What is the normal GSTR-3B due date?

For monthly taxpayers, GSTR-3B is generally due on the 20th of the succeeding month. For QRMP taxpayers, the quarterly due date is generally the 22nd or 24th depending on the State or Union Territory.

Can GST returns be filed after the due date?

Yes, subject to the portal and statutory framework, but late fee and/or interest and other consequences may arise.

Can a filed GST return be revised?

GST does not generally provide a simple revised-return mechanism. Corrections are made through prescribed subsequent-period mechanisms or applicable facilities such as GSTR-1A.

Is GST return filing required if there is no business during the month?

A registered taxpayer may still be required to file a nil return depending upon the return applicable to it.

Why should GSTR-2B be reconciled before filing GSTR-3B?

GSTR-2B reconciliation helps identify supplier-reporting differences, missing invoices and potential ITC eligibility issues before credit is claimed.

How EzyBiz India Can Assist

EzyBiz India Consulting LLP assists businesses with GST return filing and ongoing indirect-tax compliance.

Our services may include:

  • GSTR-1 preparation and filing;
  • GSTR-3B preparation and filing;
  • GSTR-1A review;
  • GSTR-2B reconciliation;
  • IMS review;
  • input tax credit reconciliation;
  • e-invoice reconciliation;
  • e-way bill reconciliation;
  • reverse-charge review;
  • GST liability computation;
  • GST annual reconciliation;
  • GST refund support;
  • GST audit assistance;
  • responses to GST notices; and
  • GST assessment and litigation support.

For complete GST assistance, visit our GST & Indirect Tax Advisory Services in India.

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Prepared By

EzyBiz India Consulting LLP

Reviewed By: Anil Agrawal, Chartered Accountant
Last Updated: August 2026

Disclaimer

The information contained on this page is intended for general informational purposes only and should not be considered legal, tax, accounting or regulatory advice.

GST return forms, portal functionalities, due dates, filing procedures, ITC rules and compliance requirements may be amended or extended from time to time. Taxpayers should verify the latest applicable provisions, notifications and GST Portal advisories before filing any return.