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To file a GST return online, sign in to the official GST Portal, open Services > Returns > Returns Dashboard, select the financial year and tax period, and complete the return tiles shown for your registration. Most businesses must distinguish between GSTR-1, which reports outward supplies, and GSTR-3B, a separate return used for the period’s summary liability and filing. Your filing frequency, due date and available options depend on your taxpayer category, turnover, location and the period’s current portal notifications.
This guide explains the workflow for a small business, including QRMP, nil returns, preparation, review, corrections and proof of successful filing. It is procedural information, not individualized tax advice.
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1. Start on the GST Portal
Use the Government of India GST Portal rather than an unofficial payment or filing page. After signing in with your GST credentials:
- Open Services.
- Choose Returns, then Returns Dashboard.
- Select the relevant financial year and return filing period.
- Click Search.
- Read the due date displayed for that period and open the required return tile.
The dashboard displays separate tiles for returns such as GSTR-1 and GSTR-3B. Do not assume that completing one completes the other. The exact labels, notices and available actions can change, so use the period shown on your dashboard as the working reference.
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2. Identify your filing frequency before entering data
There is no single schedule for every GST-registered business. First establish whether your registration is on a monthly schedule or an eligible quarterly arrangement.
Monthly filing
On a monthly schedule, GSTR-1 is generally due on the 11th of the following month. GSTR-3B has its own due date and filing requirements; rely on the date displayed for your registration and period rather than treating the GSTR-1 date as the deadline for both forms.
QRMP filing
Eligible taxpayers may opt for the Quarterly Returns and Monthly Payment (QRMP) scheme. The GST Portal describes eligibility for taxpayers with aggregate annual turnover up to ₹5 crore in the current and preceding financial years, where the other applicable conditions are met. The threshold alone does not guarantee eligibility.
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Monthly versus QRMP at a glance
| Point | Monthly schedule | QRMP schedule |
|---|---|---|
| GSTR-1 frequency | Monthly | Quarterly |
| GSTR-3B frequency | Monthly | Quarterly |
| Tax-payment cadence | Follow the applicable monthly return and payment process | Monthly payment through challan, with quarterly GSTR-3B |
| GSTR-1 standard date | 11th of the succeeding month | 13th of the month following the quarter |
| QRMP GSTR-3B standard date | Not applicable to the quarterly form | 22nd or 24th of the month following the quarter, depending on the principal place of business |
| Eligibility | Determined by your registration and applicable rules | Portal eligibility conditions apply, including the stated ₹5 crore turnover ceiling where applicable |
These are standard dates, not a promise that a particular period has not been extended. Check the live dashboard and current GST notifications before each filing.
3. Understand what each return is for
GSTR-1: outward supplies
GSTR-1 is the statement of your outward supplies. Depending on your transactions, it can include invoice-level details for registered customers, certain inter-State consumer supplies, exports, credit and debit notes, advances, amendments, nil-rated or exempt supplies, non-GST supplies, HSN or SAC summaries and relevant e-commerce supplies.
You do not fill every table merely because it appears on the portal. Include the tables that match your transactions and registration. A business selling only to consumers will have a different data set from an exporter or a business making taxable B2B supplies.
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GSTR-3B: a separate return
GSTR-3B is not a duplicate of GSTR-1. It is a separate return with summary information and the applicable liability, payment and offset steps. The detailed sequence for a tax-bearing GSTR-3B can vary with the period and the portal’s current guidance. Read the instructions shown for your form, reconcile the figures with your books and tax records, and obtain professional help when a transaction-specific position is unclear.
4. Assemble your GSTR-1 records
Prepare the period’s records before opening the data-entry screen. A practical file should include:
- Sales invoices issued to registered customers, with the customer GSTIN and invoice details.
- Applicable inter-State supplies to unregistered consumers.
- Export invoices and the information required for the relevant export table.
- Credit notes, debit notes and any amendments to earlier reported documents.
- Advances received and later adjustments, where the relevant reporting table applies.
- Nil-rated, exempt and non-GST outward supplies.
- HSN or SAC summaries at the level required for your business and period.
- Relevant supplies made through or reported by an e-commerce operator.
Keep the source invoices and supporting documents together with the spreadsheet or accounting export used to prepare the return. This makes a portal warning or later reconciliation easier to investigate.
Three ways to prepare the data
The GST Portal describes three preparation modes:
- Online entry: add records directly in the GSTR-1 tables in the portal.
- Returns Offline Tool: prepare the prescribed file offline, validate it and upload the resulting data.
- GST Suvidha Provider application: use a third-party application that supports GST filing and upload through the permitted connection. This is optional; the government portal does not require a particular vendor.
Choose the method that lets you preserve a clear source file and a review trail. For a small number of invoices, online entry may be simplest. Larger volumes may be easier to validate in the offline tool or an integrated application, but you remain responsible for the submitted figures.
5. Enter and validate GSTR-1
Use the correct tax period
Confirm the financial year, month or quarter and the filing frequency at the top of the return before uploading or entering documents. A correct invoice in the wrong period can create a mismatch that is harder to correct than a simple data-entry error.
Check document-level fields
Before generating the summary, review the GSTINs, invoice and note numbers, invoice dates, taxable values, tax rates, tax amounts, place of supply and amendment references. Check that export and e-commerce records are in the appropriate tables and that exempt, nil-rated and non-GST supplies have not been mixed with taxable supplies.
Generate the summary
The portal allows draft GSTR-1 information to be changed until filing. After entering or uploading the records, use the portal’s Generate GSTR1 Summary action so the relevant summary reflects the entries. Read the generated totals against your sales register and investigate any difference before submission.
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6. Use QRMP’s optional Invoice Furnishing Facility when it helps
QRMP taxpayers can optionally use the Invoice Furnishing Facility (IFF) to report specified B2B invoice and credit or debit note details in the first two months of a quarter. The stated IFF deadline is the 13th of the succeeding month. This can give business customers earlier visibility of eligible invoices.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchIf you do not use IFF, the remaining outward supplies can be reported in the quarterly GSTR-1 as applicable. IFF does not replace the quarterly GSTR-1, and it does not make every transaction eligible for early reporting. Check the tables and period open on your portal.
7. Review before filing
Use a final review that is independent of the person who entered the data when possible. At minimum, compare:
- The GSTIN on every B2B document with the customer’s registration details.
- Invoice numbers and dates with the issued-invoice sequence.
- Taxable value and tax totals with the sales register and general ledger.
- Place-of-supply treatment and the split between intra-State and inter-State supplies.
- Credit and debit notes, amendments, advances and export entries with the underlying documents.
- HSN or SAC summaries and the classification used in the books.
- The generated GSTR-1 summary with the records that will feed your separate GSTR-3B.
Resolve validation errors first. Do not file simply because the portal permits you to proceed: a technically accepted return can still contain an incorrect GSTIN, omitted invoice or wrong tax treatment.
8. File GSTR-1 and the separate GSTR-3B
GSTR-1
After review, submit the GSTR-1 using the filing action shown on the portal and complete the authorized-signatory authentication method offered for your registration. Save the filed-return download and the portal confirmation in your records.
GSTR-3B with tax liability
For a tax-bearing GSTR-3B, follow the current portal sequence for entering summary liability, paying or using the applicable credits, offsetting the liability and filing. The available fields and payment directions can change, so use the period-specific instructions rather than copying a prior month’s steps. Reconcile the return to your books and the outward-supply information already reported.
Nil GSTR-3B
A nil GSTR-3B is subject to system conditions. “No sales” by itself does not guarantee that the portal will accept a nil filing; other activity or balances can prevent nil treatment. Where the portal confirms that the nil route applies, the official workflow is to preview the draft, select the authorized signatory, file with DSC or EVC and download the filed return.
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9. Nil GSTR-1 is still a filing
The GST Portal’s FAQ states that a nil GSTR-1 is required for a period with no business activity. Do not skip the return because there were no invoices. Open the relevant GSTR-1 tile and complete the nil filing action available for that period.
GSTR-1 and GSTR-3B are assessed separately. A nil GSTR-1 does not automatically establish that GSTR-3B can be filed as nil, and a nil GSTR-3B does not remove a GSTR-1 obligation.
10. Know the correction windows
Prior-year GSTR-1 corrections
The official GSTR-1 FAQ describes a 30 November cutoff following the end of the relevant financial year for correcting prior-year errors or omissions in GSTR-1. Treat this as a timing rule to monitor, not as permission to wait: correct known errors as soon as the portal permits and retain the supporting document trail.
GSTR-1A for the same period
GSTR-1A provides an optional same-period opportunity to add or amend records before filing GSTR-3B for that period. If you discover an omission or error after working on GSTR-1, check whether GSTR-1A is available and whether the record qualifies under the current portal rules.
Portal functionality and statutory deadlines can change. When a correction affects tax, credit eligibility or a customer’s return, obtain advice specific to the transaction instead of relying on a general checklist.
11. Confirm filing and retain the evidence
Do not close the browser immediately after clicking file. Confirm that the portal shows the return as filed, download the filed return and store the confirmation with the period’s working papers. Retain:
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- The invoice register, credit and debit notes, export documents and HSN or SAC working file used for the return.
- Uploaded files and the final generated summary.
- Payment challans and other payment records used for a QRMP or tax-bearing filing.
- A note of who reviewed and authorized the submission.
Use a folder structure by financial year, GSTIN and tax period. A saved copy is useful if a customer asks why an invoice is missing, if a later amendment is needed or if the portal is unavailable when you need evidence of what was filed.
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12. Troubleshoot common filing problems
The expected return tile or frequency is missing
Recheck the selected financial year and period, then confirm whether the registration is monthly or QRMP. If the frequency was recently changed, use the filing option currently displayed and read the portal notice for the effective period. Do not file a different form solely because it is visible.
The portal will not accept a nil GSTR-3B
Review the system conditions for nil filing and check whether any liability, credit, prior activity or other field prevents the nil route. If the return is not nil under the portal’s rules, use the applicable tax-bearing workflow rather than repeatedly submitting a nil declaration.
Totals do not match your books
Export or print the portal draft, compare it line by line with the sales register and check GSTINs, invoice periods, place of supply, tax rates, notes and amendments. Correct the draft before filing; GSTR-1 remains changeable until it is filed.
You missed an invoice or found a prior-year error
Check whether GSTR-1A is open for the same period and whether the 30 November following-financial-year cutoff has passed for a prior-year correction. The treatment depends on the error and the current portal rules, so document the issue and seek tax advice when the correction changes liability or another taxpayer’s credit.
You are unsure whether an extension applies
Use the due date shown on the Returns Dashboard and check current GST notifications. Standard dates are useful for planning, but an extension can change the deadline for a particular period, state or taxpayer category.
13. A repeatable monthly or quarterly checklist
- Confirm the filing frequency and period on the Returns Dashboard.
- Close the sales register and collect invoices, notes, advances, exports and applicable HSN or SAC data.
- Choose online entry, the Returns Offline Tool or a GST Suvidha Provider workflow.
- Enter or upload only the tables that apply to your transactions.
- Validate GSTINs, document numbers, dates, values, tax rates and place of supply.
- Generate the GSTR-1 summary and reconcile it to the books.
- Review the separate GSTR-3B figures and follow the current payment and offset instructions.
- Complete any applicable nil-return, IFF or GSTR-1A action.
- File using the authorized-signatory method offered by the portal.
- Verify the filed status, download the returns and retain the supporting records.
What small businesses should remember
Online GST filing is a controlled sequence rather than one button: determine the right schedule, prepare outward-supply records, file GSTR-1, complete the separate GSTR-3B process, and preserve proof. QRMP can reduce the frequency of quarterly returns for eligible taxpayers, but it still involves monthly tax payments and may involve IFF. Nil periods still require attention, and every due date or correction facility should be checked against the live GST Portal for the relevant period.
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