Table of Contents
- Introduction
- Why Do Mismatches Occur Between GSTR-1 & GSTR-3B?
- Types of GST Notices for Mismatch
- How to Respond to a GST Mismatch Notice
- Preventive Measures to Avoid Mismatches
- FAQ Section
1. Introduction
A mismatch between GSTR-1 and GSTR-3B can lead to a notice from the GST department, causing unnecessary penalties and compliance burdens. If your reported outward supplies in GSTR-1 do not match with GSTR-3B, you may receive a notice under Sections 61, 73, or 74 of the GST Act.
This guide will help you understand why mismatches happen, how to respond to GST notices, and how to prevent them in the future.
2. Why Do Mismatches Occur Between GSTR-1 & GSTR-3B?
A mismatch can occur due to several reasons, including:
- Clerical errors – Incorrect data entry in GSTR-1 or GSTR-3B.
- Timing differences – Sales reported in different tax periods.
- ITC miscalculations – Claiming excess or less ITC in GSTR-3B.
- Non-reporting of credit notes – If adjustments are not reflected in GSTR-1 but adjusted in GSTR-3B.
- Turnover discrepancy – A difference in declared sales leading to tax liability mismatches.
3. Types of GST Notices for Mismatch
You may receive one of the following notices for mismatches:
A. Notice under Section 61 – Scrutiny of Returns
- Issued if discrepancies are found in GSTR-1 and GSTR-3B.
- The taxpayer must provide an explanation within 30 days.
B. Notice under Section 73 – Tax Shortfall Without Fraud
- Issued if GST liability is less than actual tax due due to an unintentional error.
- The taxpayer can pay the tax along with interest and avoid penalties.
C. Notice under Section 74 – Tax Shortfall With Fraud
- Issued if tax shortfall is due to fraud, willful misstatement, or suppression of facts.
- A penalty of up to 100% of the tax due may be imposed.
4. How to Respond to a GST Mismatch Notice
- Analyze the Notice – Identify the reason for mismatch and the specific tax period mentioned.
- Reconcile GSTR-1 & GSTR-3B Data – Compare reported sales, ITC claims, and adjustments.
- Prepare a Response – If it’s a genuine error, submit a clarification along with supporting documents.
- Pay Additional Tax If Required – If a mistake led to short payment, deposit the tax with interest before the deadline.
- Reply on GST Portal – Log in to the GST portal > Services > User Services > View Notices and Orders, and submit your response online.
5. Preventive Measures to Avoid Mismatches
- Regularly reconcile GSTR-1 & GSTR-3B to ensure consistency.
- Use automated accounting tools to minimize manual errors.
- Cross-check ITC claims with GSTR-2B before filing GSTR-3B.
- Issue proper credit/debit notes for any adjustments.
- File returns on time to avoid discrepancies due to late adjustments.
6. FAQ Section
1. What happens if I ignore a GST notice for mismatch?
Ignoring a notice can lead to penalties, tax demands, and even suspension of GST registration in severe cases.
2. How long do I have to respond to a GST notice?
You generally have 30 days from the date of the notice to respond.
3. Can I revise my GSTR-1 or GSTR-3B after receiving a notice?
No, GST returns cannot be revised once filed, but corrections can be made in subsequent returns.
4. Will I face penalties if I voluntarily pay the shortfall?
If the mismatch was unintentional (Section 73 notice), paying the shortfall with interest before the deadline may help avoid penalties.
5. How can I prevent future mismatches in GST returns?
Regular reconciliations, automation tools, and careful review before filing can help prevent discrepancies.
By following these steps, you can effectively respond to GST mismatch notices and avoid penalties. Always ensure accurate reporting to stay compliant with GST laws!

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