Small Business Got a GST Notice? Here Is What to Do Next
A GST notice sits quietly on the GST portal under Notices and Orders, and your response clock starts from the date it is uploaded, not the date you see it. Check the portal regularly, read the specific deadline on your notice, and reply there. Ignoring a notice can lead to a best judgment assessment under Section 62 or an ex-parte order under Sections 73 or 74.
What Happens After a Notice Is Issued
Most small business owners find out about a GST notice the same way: they log into the portal for something routine, an e-way bill or a return filing, and see a red notification sitting there from three weeks ago. Nobody rang a bell. GST notices do not arrive by post or a phone call in most cases, they sit quietly on the common portal under the notices and orders section, and the clock on your response starts ticking from the date they are uploaded, not the date you happen to notice them.
That gap between "issued" and "noticed" is where a lot of small businesses get into trouble. Not because they did anything wrong with their taxes, but because they missed a deadline they did not know existed.
Types of GST Notices You May Receive
Under the CGST Act, the tax department can issue several kinds of notices to a registered business, and the type matters a lot for how urgent your response needs to be.
A scrutiny or mismatch notice usually shows up when the numbers in your GSTR-1 (sales) do not tally with your GSTR-3B (summary return), or when your reported turnover does not match what your buyers have claimed as input tax credit. This is often the department flagging a clerical gap, a missed invoice, a rounding difference, before assuming anything sinister. It is asking you to explain or correct, not accusing you of fraud.
A show cause notice (SCN) is a step up. It is issued when the department believes tax has been short paid, wrongly refunded, or input credit wrongly availed, and it asks you to show cause why you should not pay the demanded amount along with interest and penalty. This is the one that genuinely needs a proper written reply, usually with supporting documents, and often benefits from professional drafting because a badly worded reply can weaken your case even when the underlying facts are fine.
There are also notices for non-filing of returns, which the department can issue after a certain number of missed filing cycles, and these carry their own separate risk, covered below.
Check the Portal, Not Your Inbox
Do not wait for an email or SMS alert to confirm a notice exists. Log into the GST portal yourself, go to Services, then User Services, then View Notices and Orders, and check periodically, especially if you know your returns have had any late filings or credit mismatches recently. Section 169 of the CGST Act treats uploading a notice on the common portal as valid service, whether or not you personally opened it. "I didn't see it" is not a defence the law recognises.
The Deadline Is the Whole Game
Every notice states a reply period, and it is not the same across notice types. Some ask for a response in a matter of days, others give a few weeks. Read your specific notice carefully for the exact date, do not assume it matches what a similar notice gave someone else, and do not assume you can informally negotiate more time by ignoring it and hoping.
The consequence of missing that deadline depends on the notice type. For persistent non-filers who ignore a GSTR-3A notice, the officer can move to a best judgment assessment under Section 62 of the CGST Act, deciding your tax liability based on whatever information is available to them, usually with figures that are not in your favour, and the law also allows the department to move toward cancelling your GST registration entirely. For a show cause notice under Sections 73 or 74 that goes unanswered, the officer instead passes an ex-parte order confirming the demand without considering any reply. A cancelled registration means you cannot legally issue tax invoices, your buyers cannot claim input credit on your supplies, and untangling a cancellation later is slower and costlier than answering the original notice would have been.
How to Reply to a GST Notice Online
Once you know a notice is sitting there, the reply happens in the same place you found it. Log into the GST portal, go to Services, then User Services, then View Notices and Orders, open the notice, and use the reply option it gives you there.
Before you draft anything, check the response date stated on that specific notice. As covered above, this date is not the same across notice types, so treat the date on your notice as the only one that matters, not a general timeframe you have heard elsewhere.
If what you received is a show cause notice, a brief acknowledgment on the portal is not enough. It needs a proper written reply, usually with supporting documents, filed within the period the notice states.
When to Bring In Help
A simple mismatch notice with an honest, well-documented explanation is often something a business owner or their accountant can handle directly. A show cause notice involving disputed tax demand, alleged wrongful credit, or anything that could snowball into penalty proceedings is a different matter. The cost of a professional reply is almost always smaller than the cost of a demand order that becomes final because the reply was late, incomplete, or legally weak.
If you have received a GST notice and are not sure which category it falls into or how to respond, Vaksy can connect you with a verified advocate on the platform who can review your specific notice and draft your reply in your own language.
Get this reviewed for your case. General guides don't know your state, your facts, or your deadline. Vaksy matches you with a verified advocate on the platform who can review your situation and draft what you need, in your own language.