Received a GST Notice? Here's Exactly What to Do (Step-by-Step)

Getting a GST notice feels scary. Your heart sinks, your mind races — "What did I do wrong?" "How much is this going to cost me?"

Take a breath. Most GST notices are routine — they're the department asking you to clarify something, not a penalty order. If you respond correctly and on time, the majority of them get resolved without any additional tax or penalty.

This guide explains every common GST notice type in plain English, what triggered it, how long you have to respond, and exactly what to include in your reply.

Why do GST notices get issued?

The GST system is heavily data-driven. The department's systems automatically compare your GSTR-1, GSTR-3B, GSTR-2B, and your suppliers' returns — and flag discrepancies. The most common triggers are:

1. ITC mismatch — You claimed more ITC in GSTR-3B than what shows in GSTR-2B
2. GSTR-1 vs GSTR-3B difference — Your sales in GSTR-1 don't match the liability declared in GSTR-3B
3. Late filing — Filing after the due date (especially multiple months)
4. Non-filing — Not filing returns for consecutive periods
5. Turnover discrepancy — Your declared turnover doesn't match e-way bill data or income tax returns
6. Wrong HSN codes — Leading to incorrect tax rate application
7. GSTR-9 vs monthly returns — Annual return figures don't match cumulative monthly figures

Types of GST notices — and what each one means

ASMT-10 — Scrutiny notice

This is the most common notice. The officer has noticed a discrepancy in your return and wants you to explain it. Think of it as a "please clarify" letter.

• Response deadline: 30 days (can request extension)
• Response form: ASMT-11 (filed on the GST portal)
• Typical trigger: ITC claimed > GSTR-2B, or GSTR-1 vs 3B mismatch
• What to do: Provide the explanation with supporting documents (invoices, ledger extracts, reconciliation statements)

DRC-01 — Show Cause Notice (SCN)

This is more serious. The officer believes there's a tax liability you haven't paid and is formally asking you to explain why it shouldn't be demanded. This usually comes after ASMT-10 if the response wasn't satisfactory, or directly for clear-cut cases.

• Response deadline: 30 days (extendable by 30 more)
• Response form: DRC-06 (reply to SCN)
• Section 73: Non-fraud cases — no penalty, just tax + interest (5-year lookback)
• Section 74: Fraud/wilful suppression — 100% penalty on top of tax + interest (5-year lookback, extendable to 5.5 years)

DRC-01A — Intimation before SCN

Think of this as a "friendly warning" before the formal SCN. The department tells you what discrepancy they've found and gives you a chance to either:

• Accept the liability and pay voluntarily (via DRC-03) — reduced penalty or none
• Explain the discrepancy — if accepted, no SCN is issued

This is actually a good thing. It means you can settle the matter early, often with significantly lower consequences than fighting an SCN.

DRC-03 — Voluntary payment

Not technically a "notice" — it's the form you file to make a voluntary payment when you discover you owe additional tax. Use it:

• Before any notice is issued (self-correction)
• In response to DRC-01A (pre-SCN settlement)
• In response to DRC-01 (accepting the demand)

Paying voluntarily before an SCN is the cheapest way out — usually just tax + interest, no penalty.

GSTR-3A — Non-filing notice

If you haven't filed a return by the due date, the system auto-generates GSTR-3A giving you 15 days to file. After that:

• The officer can assess your liability based on available data (best judgement assessment)
• Your GSTIN can be suspended after 2+ consecutive months of non-filing
• Late fees accrue at ₹50/day (₹20/day for nil returns)

CMP-05 — Show cause for removing composition status

If you're on the composition scheme and the department believes you've breached the turnover limit or engaged in disqualified activities (like inter-state supply), you get CMP-05. You have 15 days to respond.

How to respond to a GST notice

Regardless of the notice type, the process follows the same general pattern:

Step 1 — Read it carefully

Log in to the GST portal → Dashboard → "View Notices and Orders". Read the notice completely. Note down:

• The notice type and section (73 or 74)
• The tax period in question
• The specific discrepancy they're alleging
• The response deadline
• The demanded amount (if any)

Step 2 — Check if they're right

Before you panic or get defensive, actually verify the numbers. Pull your GSTR-3B, GSTR-1, GSTR-2B for the relevant period and check if the discrepancy is real.

Common findings at this stage:

• You did over-claim ITC by mistake (data entry error, duplicate invoice)
• The mismatch exists but has a valid explanation (invoice in different period, credit note adjustment)
• The notice is based on incorrect data from the department's side (supplier filed late, correction not reflected)

Step 3 — Gather supporting documents

Depending on the issue, you'll typically need:

• Purchase invoices and supplier GSTIN details
• GSTR-2B download for the relevant period
• Bank statements showing payment to suppliers
• Reconciliation statement (GSTR-3B vs GSTR-2B vs books)
• Credit/debit notes, if the issue is return-related

Step 4 — Draft your reply

Your response should be:

• Point-by-point — Address every item mentioned in the notice
• Fact-based — Reference specific invoice numbers, dates, and amounts
• Concise — Officers handle hundreds of cases; don't write an essay
• Well-documented — Attach supporting evidence for every claim you make

Step 5 — File the response on the GST portal

Go to Services → User Services → My Applications → select the notice → reply. Upload your response letter and supporting documents as PDFs. Do NOT reply by email or physical letter — only responses filed through the portal are officially recorded.

Response deadlines at a glance

What if you actually owe the tax?

Sometimes the department is right. If you genuinely under-paid, here's the smartest approach:

1. Pay immediately via DRC-03 — include tax + interest calculated at 18% p.a. from due date
2. Pay before the SCN if possible — Section 73 cases with voluntary payment before SCN typically attract zero penalty
3. If SCN already issued — Pay within 30 days of the order to get reduced penalty (25% under Section 73, or 25% under Section 74 for the first offence)

When to involve a professional

You can handle most ASMT-10 and DRC-01A notices yourself if:

• The amount is small (under ₹1 lakh)
• The discrepancy has a straightforward explanation
• You have clean records and documentation

But get a CA or tax professional involved if:

• You've received a DRC-01 (formal SCN) — especially under Section 74 (fraud/suppression)
• The demand amount is significant (₹5 lakh+)
• Multiple periods are being questioned simultaneously
• You're not sure if the department's calculation is correct
• You need to file an appeal (DRC-07 order has been passed)

How to avoid GST notices in the first place

The best notice is the one you never receive. Here are the things that actually matter:

1. Reconcile ITC every month — Match your purchase register against GSTR-2B before filing GSTR-3B. This one step prevents the majority of notices.
2. Match GSTR-1 and GSTR-3B — Your outward supply values must be consistent across both returns. File GSTR-1 first, then use those numbers in GSTR-3B.
3. Use correct HSN codes — Our free HSN search tool has 22,000+ codes from the CBIC master list. Get it right on every invoice.
4. File on time, every time — Use our GST calendar to never miss a deadline.
5. Keep documentation clean — Every ITC claim should have a corresponding invoice, payment proof, and GSTR-2B entry.

Quick reference: notice → action flowchart

1. Receive notice on GST portal → Note the type, deadline, and demanded amount
2. Verify the discrepancy against your records
3. If they're right → Pay via DRC-03 immediately (tax + interest)
4. If they're wrong → Draft point-by-point reply with evidence → File on portal before deadline
5. If demand amount is large or Section 74 → Consult a CA before responding
6. Follow up → Track the case status on the portal until closure

GST notices are stressful, but they're manageable when you act quickly and keep good records. And if you want to stop getting them in the first place, try 1010 free — our compliance engine catches the issues that trigger notices before they leave your desk.