What is GST Return Filing?
GST return filing is the periodic reporting of your sales, purchases and tax paid on the GST portal. Regular taxpayers file GSTR-1 for outward supplies and GSTR-3B as a summary return with payment of tax. Returns must be filed even when there is no business activity, as a nil return.
Who needs it
- Every regular GST-registered business, including those with nil sales in a month.
- Businesses under the QRMP scheme who file quarterly and pay tax monthly.
- Composition scheme taxpayers who file CMP-08 and GSTR-4.
- E-commerce sellers and exporters with frequent invoices and refund claims.
- Businesses that want their input tax credit reconciled and protected.
Benefits
- Returns filed within due dates, so no late fee or interest.
- Input tax credit matched against GSTR-2B before filing.
- Fewer notices from mismatches between GSTR-1 and GSTR-3B.
- Monthly tax summary and a payment reminder in plain language.
- One team for registration, returns, annual return and notices.
A reconciliation routine that prevents notices
Most GST notices come from mismatches. A simple monthly routine prevents most of them. Compare outward supplies in your books with GSTR-1, compare GSTR-1 with GSTR-3B, and compare eligible credit in your books with GSTR-2B. Follow up with suppliers whose invoices are missing in GSTR-2B instead of claiming the credit on assumption. Record the explanation for any difference in a short note for each month.
Special cases
Four situations change what the returns have to show, and each is a common source of mismatch.
- E-commerce sellers: marketplaces report sales made through them and collect tax at source, which appears in your records and should be matched.
- Exporters: supplies may be zero-rated using a Letter of Undertaking, and returns must show them correctly to support any refund.
- Composition taxpayers: they file a quarterly statement and an annual return and cannot claim input credit.
- Businesses with several registrations: each registration files its own returns.
Example of a monthly cycle
A trading business sends its sales and purchase data on the 4th. We prepare GSTR-1 on the 5th and share the summary. On the 14th, after suppliers have filed, we download GSTR-2B, match it with the purchase register and list any invoices that are missing. On the 17th we compute the tax payable, you arrange the funds, and we pay and file GSTR-3B before the 20th. You get the acknowledgements and a one-page summary of the tax paid, credit used and any open items.
What you get from a monthly review
A monthly review earns its place because it surfaces problems while they can still be corrected, rather than at the annual return.
- Early warning of credit that suppliers have not reported
- Control over cash needed for tax each month
- A running list of questions to settle before the annual return
- Fewer surprises at audit time
Official sources and common questions
Three questions come up most often: whether to file yourself, what happens when a supplier files late, and how corrections are made.
- Can I file returns myself? Yes. The GST portal is free, and a CA adds reconciliation, review and follow-up.
- What if my supplier files late? Credit appears when the supplier files, so follow up and claim in the right month.
- What about amendments? Corrections to earlier invoices are made in a later return, within the time allowed.
Official sources: the GST portal, the CGST Act, 2017 and the rules.
Documents required
- 01Sales invoices, credit notes and debit notes for the period
- 02Purchase invoices and expense bills
- 03Sales and purchase registers or Tally/Zoho data export
- 04E-commerce operator reports (for marketplace sellers)
- 05Bank statements, to cross-check receipts
- 06GST portal login access, or authorisation to file as your GST practitioner
- 07Details of any advance received or reverse-charge purchases
Due dates and penalties
| Item | Due date | If missed |
|---|---|---|
| GSTR-1 (monthly filers) | 11th of the next month | Late fee of ₹50 per day (₹20 for nil returns), subject to the cap |
| GSTR-3B (monthly filers) | 20th of the next month | Late fee plus interest on tax paid late (currently 18% a year) |
| QRMP: GSTR-1 and GSTR-3B (quarterly) | 13th and 22nd or 24th after the quarter, depending on state | Same late fee and interest |
| GSTR-9 annual return | 31 December after the financial year | Late fee per day, subject to a cap on turnover |
Due dates are sometimes extended by notification. Confirm the current date on the GST portal or with us.
Mistakes to avoid
- Claiming input tax credit that is not reflected in GSTR-2B.
- Filing GSTR-3B without matching it to GSTR-1.
- Not filing nil returns, which still attracts late fees.
- Paying tax late and ignoring the interest liability.
- Missing amendments to earlier invoices before the cut-off.
- Using a wrong place of supply, which charges IGST instead of CGST and SGST (or the reverse).
Why PHMG
- Partner-led: a chartered accountant reviews your work, not only a junior team.
- Clear fee and scope in writing before we start.
- Deadlines tracked for you, with reminders well before the due date.
- Your documents and data are handled confidentially.
- Online service across India, with a single point of contact.
Fees depend on your case. Request a quote for a clear scope and fee.