Received a GST Notice? Here's Exactly How to Respond to DRC-01, ASMT-10 & REG-03 in 2026

GST notice reply format for DRC-01, ASMT-10 and REG-03 is the first thing most taxpayers search for the moment a red alert lands on their GST portal dashboard — and getting it wrong in the first few days is what turns a routine query into a full-blown demand order.

Every year, thousands of GSTINs get flagged for something: a mismatch between GSTR-1 and GSTR-3B, a missing document during registration, or an ITC figure that doesn't tally with GSTR-2B. The problem isn't the notice itself; it's not knowing which form you've received, what it actually means, and how many days you have before things escalate. This guide breaks down the three notices taxpayers confuse most often: DRC-01, ASMT-10, and REG-03 and exactly how to respond to each one in 2026.

Why These Three GST Notices Get Confused So Often

People often treat every GST notice as equally alarming, but they sit at completely different stages of the compliance journey:

REG-03 shows up before you even have a GSTIN ,it's a query on your registration application.

ASMT-10 shows up after you're registered and filing returns, it's a scrutiny query, not a demand.

DRC-01 is the serious one , a formal show cause notice claiming you owe tax, interest, or penalty.

Knowing which one you've got determines your entire response strategy.

GST REG-03 Notice: What It Means and How to Reply

If you applied for GST registration and the officer wasn't satisfied with something in your application, you'll get a Form GST REG-03 notice under Rule 9(2) of the CGST Rules. This isn't a rejection but it's a request for clarification, extra documents, or correction of details like address proof, promoter information, or Aadhaar mismatches.

Common triggers for REG-03:

1.) Mismatch between promoter details and Document Identification Number (DIN) /UIDAI records

2.) Blurry, incomplete, or expired supporting documents

3.) Incorrect Corporate Identification Number (CIN)

4.) Data entry errors in the registration form

You must respond using Form GST REG-04, and the clock is tight , you only get one shot to answer every point raised, so read the notice carefully before drafting your reply.

REG-03 Timeline at a Glance
 

If you miss the 7-working-day window or the officer isn't satisfied with your explanation, the application gets rejected and you'll need to start the entire registration process over ,so treat this deadline as non-negotiable.

GST ASMT-10 Scrutiny Notice: The "Explain This" Query

Once you're registered and filing returns, the department runs automated checks on your GSTR-1, GSTR-3B, and GSTR-2A/2B data. If something doesn't add up, you'll get a Form GST ASMT-10 notice under Section 61 of the CGST Act, read with Rule 99.

Typical reasons an ASMT-10 lands in your inbox:

1.) Output tax liability in GSTR-1 higher than what's declared in GSTR-3B

2.) ITC claimed in GSTR-3B exceeds what's showing in GSTR-2A/2B

3.) Credit claimed from a supplier whose registration was cancelled

4.) ITC on blocked categories under Section 17(5) like motor vehicles or insurance

5.) Turnover mismatches between GST returns and e-way bill or income-tax data

Here's the good news: ASMT-10 is purely an inquiry. No demand can be raised at this stage. Your job is to reply in Form GST ASMT-11, ideally reconciling each flagged point separately with supporting documents, rather than sending a vague, generic explanation.

If the officer accepts your explanation, they close the matter with Form GST ASMT-12 and that's the end of it. If they don't, or if you ignore the notice entirely, the matter can escalate to an audit under Section 65/66, an inspection under Section 67, or a full demand notice in DRC-01.

ASMT-10 Response Checklist
 

 

GST DRC-01 Show Cause Notice: The One You Can't Ignore

This is where things get serious. Form GST DRC-01 is a formal show cause notice issued under Section 73 (genuine errors, no fraud) or Section 74 (fraud, wilful misstatement, or suppression of facts) of the CGST Act, following Rule 142.

From FY 2024-25 onwards, both categories have effectively been merged under the newly inserted Section 74A, which applies a single, unified timeline and penalty structure regardless of whether fraud is alleged, so if you're dealing with a DRC-01 for a recent financial year, check which section is actually invoked before assuming the old Section 73/74 rules apply.

What you should verify the moment you receive a DRC-01:

1.) Whether the notice is within the statutory time limit for that financial year

2.) Whether Section 73 or Section 74 (or 74A) has been correctly invoked , wrongly invoking Section 74 without evidence of fraud is a valid ground to challenge

3.) Whether the tax, interest, and penalty figures actually match your own reconciliation

You must reply using Form GST DRC-06, generally within 30 days of the notice. You can also pay all or part of the demand voluntarily through Form GST DRC-03 while still contesting the disputed portion in your DRC-06 reply.

Section 73 vs Section 74: Penalty Comparison
 

Ignore a DRC-01 and the officer will pass an ex-parte order in Form GST DRC-07, confirming the demand based purely on their own assessment, almost always the costliest outcome. At that stage, your only recourse is an appeal under Section 107, which requires a mandatory pre-deposit.

Conclusion

Every GST notice has its own clock, its own form, and its own escalation path. The single biggest mistake taxpayers make isn't the underlying tax issue. It's missing the reply window because they didn't recognize which notice they were dealing with. Bookmark this comparison, check your GST portal regularly under "View Additional Notices," and respond within the deadline every single time.

Received a GST notice and unsure how to respond? gstfilling.co can help you draft the right reply, on time, in the correct format.

Frequently Asked Questions

Q.1) What is the difference between ASMT-10 and DRC-01? 

ASMT-10 is a scrutiny query asking you to explain a discrepancy, no demand exists yet. DRC-01 is a formal demand notice claiming you owe tax, interest, and penalty.

Q.2) How many days do I have to reply to a GST REG-03 notice? 

7 working days from the date you receive the notice, using Form GST REG-04.

Q.3) What happens if I don't respond to an ASMT-10 notice? 

The matter can escalate to a departmental audit, inspection, or a formal DRC-01 show cause notice.

Q.4) Can I avoid a penalty under a DRC-01 notice? 

Yes, under Section 73, paying the tax and interest before the final order results in zero penalty.

Q.5) What form do I use to reply to a DRC-01 notice? 

Form GST DRC-06, filed electronically through the GST portal.

Q.6) Is GST REG-03 a rejection of my registration application? 

No, it's a request for clarification or additional documents - not a rejection.

Q.7) What is the time limit to reply to a DRC-01 show cause notice? 

Typically 30 days from the date of service, though the exact period is specified in the notice itself.

Q.8) Does an unanswered notice always lead to a penalty? 

Not always immediately, but non-response usually results in an unfavourable ex-parte decision that's harder and costlier to reverse later.

Author Bio

Harshita Saini is an SEO Executive at LegalDev, where she leads SEO and content strategy for gstfilling.co. She researches the latest GST notifications, tax reforms, and compliance updates to create accurate, search-driven content for businesses across India.
Her expertise lies in simplifying complex GST laws into easy-to-understand guides, helping entrepreneurs, startups, and taxpayers stay compliant, avoid penalties, and make informed tax decisions with confidence.