GST & Indirect Tax

Nil GST Returns Through SMS: GSTR-1, GSTR-3B and CMP-08 Controls

Finin2min GST Desk·June 2026·7 min readNIL RETURN

Reviewed by CA Nikhil Gupta · Last reviewed 19 June 2026

Nil return filing through SMS is convenient, but only when the period is truly nil and the authorised-signatory details are clean. A wrong nil filing can create a bigger reconciliation problem than a late online filing.

Use the GSTR-9 and GSTR-9C Applicability Checker to apply these points to your figures or facts.

What official portal guidance covers

The GST portal has separate guidance for filing nil GSTR-1 through SMS, nil GSTR-3B through SMS and nil CMP-08 through SMS. The availability and conditions differ by form and taxpayer type, so finance teams should not use one form’s SMS rule for another form.

For the connected rule, example or next step, see GST CMP-08 and GSTR-4 Calendar for Composition Taxpayers.

Nil return pre-check

Question	Why it matters
Any outward supply?	If yes, GSTR-1 is not nil.
Any liability, ITC, RCM or late fee?	If yes, GSTR-3B may not be nil.
Composition taxpayer with activity?	CMP-08 nil requires checking composition-period conditions.
Authorised mobile correct?	SMS filing depends on registered authorised signatory details.

For the connected rule, example or next step, see GST TCS for E-Commerce Operators: Section 52 and GSTR-8 Compliance Guide.

Controls before using SMS

Take a nil-period approval from the business owner.
Check sales register, e-invoice/e-way bill data and bank collections.
Check purchase/RCM ledgers before treating GSTR-3B as nil.
Confirm authorised signatory mobile number on GST portal.
Save SMS acknowledgement and return status screenshot.

When online filing is safer

Use online filing where there is any doubt, saved data, prior-period liability, RCM, late fee, or mismatch in authorised-signatory setup. SMS filing should be reserved for genuinely clean nil periods.

Finin2min control: Never approve nil return based only on “no sales”. GSTR-3B nil also needs checks on purchases, RCM, ITC and previous-period dues.

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Official sources used

This article is built only from official GST/CBIC/GST Council/GST portal sources. Always verify live notifications, portal advisories and state-specific extensions before filing.

For the connected rule, example or next step, see Restaurant and Food Delivery GST: Platform, Invoice and Rate Controls.

FAQs

Can nil GSTR-3B be filed through SMS?▾

Yes, GST portal guidance allows nil GSTR-3B through SMS for eligible taxpayers satisfying the stated conditions.

Does no sales automatically mean nil GSTR-3B?▾

No. You must also check RCM, ITC, tax, interest, late fee and previous-period dues before treating GSTR-3B as nil.

Should the acknowledgement be saved?▾

Yes. Save the SMS acknowledgement and portal status as evidence of filing.

Source and review trail

Use the current official instrument, portal or regulator publication before acting. This panel separates the category authority from page-specific references.

Primary category: GST & Indirect Tax
Official starting point: www.gst.gov.in

Page source links

Primary sources & related provisions

Statutory provisions referenced in this guide:

Nil-return filing by SMS: legal and operating map

Use the SMS route only for a genuinely nil period. GSTR-1, GSTR-3B and CMP-08 have different eligibility checks. A saved or submitted return, pending liability, reverse-charge exposure, supplies, advances or credit activity can make the period non-nil or require portal filing.

1. Reconcile
Sales, purchases, reverse charge, e-invoices, cash and credit ledgers.
2. Check status
Confirm the return is due and eligible for the SMS facility.
3. Initiate
Send the prescribed message from the authorised mobile number linked to the GSTIN.
4. Confirm
Use the verification code within its validity and retain the ARN.

Form-specific control

Statement	Nil means	Do not overlook
GSTR-1	No outward supplies for the tax period.	Nil-rated, exempt and non-GST outward supplies still belong in return reporting and can prevent a nil declaration.
GSTR-3B	No outward liability and no reportable inward/reverse-charge or credit activity under the facility conditions.	Import, reverse charge, ITC reversal and interest checks.
CMP-08	No self-assessed composition-tax payment particulars for the quarter.	Turnover records, inward supplies attracting reverse charge and late fee.

Practical example

A registered person issued no invoices, but received a legal service on which tax is payable under reverse charge. The period should not be treated as nil merely because the sales register is empty. Reconcile the purchase and RCM ledgers and use the portal route appropriate to the return.

Advisory file

Keep the nil-return approval, ledger extracts, the SMS sent, confirmation response, ARN and portal status screenshot. If the GSTIN or period in the acknowledgement is wrong, escalate immediately rather than assuming the message cured the default.

Finin2min summary

The SMS facility changes the filing channel, not the statutory test. Establish that every relevant reporting field is nil, file from the registered mobile number and verify the ARN on the portal.

Questions

Can a nil return be filed after saving data on the portal? Eligibility can be affected; follow the current portal guide and clear or complete the saved workflow. Is an SMS acknowledgement enough? Retain it, but also verify the filed status and ARN against the GSTIN and period.

Primary sources

GST portal: nil GSTR-1 by SMS | GST portal: nil GSTR-3B by SMS | GST portal: SMS filing FAQs, including CMP-08

Educational compliance guidance. The GST portal, statute, rules and instructions applicable to the tax period control.