GST · Nil Return Filing

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

Finin2min GST Desk·June 2026·7 min readNIL RETURN

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.

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.

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.

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.

📝

Make GST compliance less reactiveKeep a monthly evidence file for returns, notices, credits and portal acknowledgements before the issue becomes a demand.

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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.

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.