Section 61 – Scrutiny of GST Returns: GSTR-1, GSTR-3B Mismatch, ITC Issues and Reply Process

Received a GST Scrutiny Notice? Understand Section 61 Before Responding

GST compliance is largely based on self-assessment, where registered taxpayers calculate their tax liability, claim eligible Input Tax Credit (ITC), and file GST returns regularly.

However, the GST department has the authority to verify whether the information provided in GST returns is accurate and consistent with available records.

One such verification mechanism is scrutiny of GST returns under Section 61 of the CGST Act, 2017.

Under Section 61, the proper officer may examine GST returns and related details submitted by a registered person to verify the correctness of the information declared. If any discrepancy is identified, the taxpayer may be asked to provide an explanation.

In recent years, GST scrutiny notices have become common due to automated data analysis and comparison of information available through different GST records.

Businesses may receive scrutiny notices due to issues such as:

• Difference between GSTR-1 and GSTR-3B.
• Input Tax Credit (ITC) mismatch.
• Difference between books of accounts and GST returns.
• Incorrect tax payment.
• Excess ITC claim.
• Unreported outward supplies.
• Difference between e-invoice data and return filing.
• Mismatch between GSTR-2B and ITC claimed.

A GST scrutiny notice does not automatically mean that tax has become payable. It provides an opportunity for the taxpayer to explain the difference and submit supporting documents.

However, an incorrect or incomplete reply may lead to further proceedings, including audit, inspection, or demand proceedings under applicable provisions.

This detailed guide explains:

• Meaning of Section 61 of GST Act.
• GST scrutiny of returns process.
• Reasons for receiving GST scrutiny notices.
• GSTR-1 and GSTR-3B mismatch.
• ITC mismatch issues.
• GST ASMT-10 notice.
• Reply process.
• Documents required.
• Common mistakes.
• Practical examples.
• Compliance checklist.

What Is Section 61 of GST Act?

Section 61 of the CGST Act deals with the scrutiny of returns filed by registered taxpayers.

It allows the GST officer to examine GST returns and related particulars to verify whether the information declared by the taxpayer is correct.

The objective of GST scrutiny is to identify possible discrepancies between:

• GST returns filed by the taxpayer.
• Data available with the GST department.
• Other connected compliance records.

The scrutiny process is mainly a verification mechanism and does not automatically result in a tax demand.

For example:

A taxpayer reports sales of ₹50 lakh in GSTR-1 but declares taxable turnover of ₹40 lakh in GSTR-3B.

The GST department may identify this difference and ask the taxpayer to explain the mismatch.

The taxpayer can submit clarification along with supporting documents explaining the reason for the difference.

Purpose of GST Return Scrutiny Under Section 61

The main purpose of GST scrutiny is to ensure:

Accuracy of GST Returns

GST officers verify whether taxpayers have correctly reported:

• Sales.
• Tax liability.
• Input Tax Credit.
• Exempt supplies.
• Other relevant details.

Identification of Tax Mismatches

Scrutiny helps identify inconsistencies between different GST records.

Common mismatches include:

• GSTR-1 vs GSTR-3B mismatch.
• GSTR-3B vs GSTR-2B ITC difference.
• E-way bill data vs declared turnover.
• E-invoice data vs GST returns.

Prevention of Incorrect ITC Claims

Input Tax Credit is one of the major areas reviewed during GST scrutiny.

The department may examine whether:

• ITC has been claimed correctly.
• Supporting invoices are available.
• Conditions for ITC eligibility are satisfied.

Improving GST Compliance

GST scrutiny encourages businesses to maintain:

• Accurate accounting records.
• Proper reconciliations.
• Timely GST return filing.

GST Scrutiny Process Under Section 61

The GST scrutiny process generally follows a structured approach.

Step 1: Selection of GST Returns for Scrutiny

GST returns may be selected for scrutiny based on:

• Risk parameters.
• Data analysis.
• Available GST information.
• Return discrepancies.

The GST officer examines the information submitted by the taxpayer along with related records.

Step 2: Identification of Discrepancies

During scrutiny, the officer may identify differences related to:

• Tax liability.
• Turnover.
• ITC claims.
• Return information.

Examples:

• Sales reported in GSTR-1 are higher than GSTR-3B.
• ITC claimed exceeds eligible ITC.
• Tax rate applied appears incorrect.

Step 3: Issuance of GST ASMT-10 Notice

If discrepancies are found, the GST officer issues a notice in Form GST ASMT-10.

The notice communicates:

• Nature of discrepancy.
• Details requiring clarification.
• Tax, interest, or other amounts involved, wherever applicable.

The taxpayer is required to submit an explanation within the prescribed time mentioned in the notice. Under the GST rules, the officer may seek an explanation within a period not exceeding fifteen days from the date of service of notice.

Step 4: Submission of Reply by Taxpayer

The taxpayer needs to review the notice carefully and prepare a detailed reply.

A proper GST scrutiny reply should explain:

• Reason for mismatch.
• Relevant facts.
• Supporting documents.
• Reconciliation statements.
• Corrective action taken, if any.

For example:

A GSTR-1 and GSTR-3B mismatch occurs because invoices were issued in March but reported in the subsequent return period due to accounting adjustments.

The taxpayer can explain the reason and submit reconciliation details.

Step 5: Further Action After Reply

After reviewing the explanation:

If the explanation is satisfactory:

The officer may accept the reply and no further action may be taken for that discrepancy.

If the explanation is not satisfactory:

Further action may be initiated under applicable GST provisions, including audit, inspection, or determination of tax dues under relevant sections.

Common Reasons for Receiving GST Scrutiny Notice

Businesses may receive GST scrutiny notices due to multiple reasons.

1. GSTR-1 and GSTR-3B Mismatch

One of the most common reasons for GST scrutiny is a difference between outward supply details reported in GSTR-1 and tax liability declared in GSTR-3B.

Example:

A company reports:

GSTR-1 turnover:

₹1 crore

GSTR-3B turnover:

₹85 lakh

Difference:

₹15 lakh

The department may ask the taxpayer to explain why turnover reported in both returns is different.

Possible reasons may include:

• Amendment of invoices.
• Credit notes.
• Reporting errors.
• Timing differences.

A proper reconciliation can help explain genuine differences.

2. Input Tax Credit (ITC) Mismatch

ITC mismatch is another major reason for GST scrutiny.

The department may compare:

• ITC claimed in GSTR-3B.
• Eligible ITC available based on GST records.
• Purchase records.

Common ITC mismatch reasons include:

• Supplier not filing returns.
• Incorrect invoice details.
• Duplicate ITC claim.
• Difference between books and GST returns.
• Claiming ineligible ITC.

Businesses should regularly perform ITC reconciliation to avoid scrutiny issues.

3. Difference Between Books and GST Returns

The GST department may compare:

• Accounting records.
• GST returns.
• Financial statements.

Differences may occur due to:

• Unrecorded sales.
• Accounting adjustments.
• Credit notes.
• Incorrect classification.

4. E-Invoice and GST Return Mismatch

Businesses covered under e-invoicing requirements need to ensure consistency between:

• E-invoice data.
• GSTR-1.
• GSTR-3B.

Mismatch may attract scrutiny.

5. Incorrect Tax Rate Application

If a business applies an incorrect GST rate, the department may raise a query.

Example:

A product taxable at 18% GST is reported at 12%.

The taxpayer may need to explain the classification and tax treatment.

6. Excessive ITC Claim

Businesses claiming unusually high ITC compared to turnover may receive scrutiny queries.

The taxpayer should maintain:

• Purchase invoices.
• Supplier details.
• Payment records.
• ITC calculations.

GSTR-1 and GSTR-3B Mismatch Under GST Scrutiny

One of the most common reasons for receiving a GST scrutiny notice under Section 61 is a mismatch between GSTR-1 and GSTR-3B returns.

Although both returns relate to outward supplies, they serve different purposes.

GSTR-1 contains details of outward supplies made by the taxpayer, including invoice-wise sales information.

GSTR-3B is a summary return where taxpayers declare taxable supplies, tax liability, and claim eligible Input Tax Credit.

Ideally, the information reported in:

• GSTR-1
• GSTR-3B
• Books of accounts

should be consistent.

Differences between these records may trigger GST scrutiny queries.

Common Reasons for GSTR-1 and GSTR-3B Mismatch

A mismatch does not always mean that tax has been avoided. There can be genuine business reasons behind differences.

Some common reasons include:

1. Timing Difference in Reporting Invoices

Sometimes invoices may be recorded in one tax period but reported in another due to:

• Accounting adjustments.
• Late invoice reporting.
• Internal reconciliation issues.

Example:

A company issues an invoice on 31 March but reports it in the April GST return due to year-end closing adjustments.

The difference between GSTR-1 and GSTR-3B may require explanation during scrutiny.

2. Credit Notes and Debit Notes

Differences may occur due to:

• Credit notes issued after original invoices.
• Amendments in outward supply details.
• Adjustments made in subsequent periods.

Businesses should maintain proper documentation explaining such adjustments.

3. Incorrect Tax Liability Reporting

A taxpayer may accidentally report different taxable values or tax amounts in GSTR-1 and GSTR-3B.

Example:

GSTR-1:

Taxable turnover – ₹75 lakh

GSTR-3B:

Taxable turnover – ₹70 lakh

Difference:

₹5 lakh

The taxpayer needs to verify whether the difference relates to:

• Missed invoices.
• Amendments.
• Reporting errors.

4. Amendment of Previous Period Invoices

Changes made in previous period invoices may reflect differently across GST returns.

Businesses should maintain invoice-level reconciliation to explain such variations.

How to Resolve GSTR-1 and GSTR-3B Mismatch?

Businesses should prepare a proper reconciliation statement before replying to a GST scrutiny notice.

The reconciliation should compare:

A proper reconciliation helps establish whether the difference is:

• A genuine timing issue.
• Reporting error.
• Actual tax liability difference.

Input Tax Credit (ITC) Mismatch Under GST Scrutiny

Input Tax Credit is another major area reviewed during GST return scrutiny.

The GST department may verify whether the ITC claimed by the taxpayer is supported by:

• Valid tax invoices.
• Receipt of goods/services.
• Eligible business transactions.
• Proper supplier reporting.

ITC mismatches are commonly identified by comparing:

• ITC claimed in GSTR-3B.
• ITC available through GST records.
• Purchase register.
• Accounting records.

The availability of ITC is subject to conditions prescribed under GST law, and businesses should maintain proper supporting records for every claim.

Common Reasons for ITC Mismatch

1. Difference Between GSTR-3B and GSTR-2B

A common issue arises when ITC claimed in GSTR-3B does not match ITC available in GSTR-2B.

Reasons may include:

• Supplier has not filed GSTR-1.
• Supplier reported invoice incorrectly.
• Wrong GSTIN mentioned.
• Invoice uploaded in a different period.

Example:

Purchase register ITC:

₹5 lakh

ITC claimed in GSTR-3B:

₹5 lakh

ITC reflected in GSTR-2B:

₹4 lakh

Difference:

₹1 lakh

The taxpayer may need to explain the reason for the difference and provide supporting documents.

2. Claiming Ineligible ITC

GST scrutiny may identify ITC claims relating to:

• Personal expenses.
• Blocked credits.
• Non-business usage.
• Transactions not fulfilling GST conditions.

Businesses should review ITC eligibility before claiming credit.

3. Supplier Compliance Issues

Sometimes ITC differences occur because suppliers fail to:

• File GST returns.
• Upload invoices correctly.
• Report B2B transactions.

In such cases, businesses should maintain evidence showing:

• Purchase transaction.
• Invoice availability.
• Receipt of goods/services.
• Payment details.

4. Duplicate ITC Claim

Duplicate ITC may occur due to:

• Duplicate invoice entries.
• Accounting mistakes.
• Manual data errors.

Regular ITC reconciliation helps identify such issues.

ITC Reconciliation Before GST Scrutiny Reply

Before submitting a reply, businesses should prepare an ITC reconciliation statement.

A proper reconciliation should include:

GST ASMT-10 Notice Reply Process

When discrepancies are identified during scrutiny, the GST officer issues a notice in FORM GST ASMT-10 seeking an explanation from the taxpayer.

The reply should not be prepared casually.

A professional GST scrutiny reply should include:

1. Understanding the Notice

First, the taxpayer should carefully review:

• Period involved.
• Nature of discrepancy.
• Amount mentioned.
• Documents requested.

2. Preparing Reconciliation

The taxpayer should prepare a detailed reconciliation explaining:

• Difference amount.
• Reason for difference.
• Supporting records.

3. Drafting Explanation

The reply should clearly explain:

• Facts of the case.
• Applicable GST provisions.
• Reason for mismatch.
• Corrective action taken.

4. Attaching Supporting Documents

Documents may include:

• Sales register.
• Purchase register.
• Tax invoices.
• Credit notes.
• Debit notes.
• GST returns.
• Bank statements.
• Reconciliation statements.

Example: GST Scrutiny Reply for GSTR-1 and GSTR-3B Difference

A business receives ASMT-10 notice stating that:

GSTR-1 taxable turnover:

₹1.20 crore

GSTR-3B taxable turnover:

₹1 crore

Difference:

₹20 lakh

After reviewing records, the business identifies that:

• ₹15 lakh relates to credit notes adjusted in the next period.
• ₹5 lakh relates to invoice amendment reporting.

The business prepares a reconciliation statement and submits supporting documents explaining the difference.

If the explanation is accepted, further action may not be required.

Documents Required for GST Scrutiny Reply

Businesses should keep the following documents ready:

Sales Related Documents

• Sales register.
• Tax invoices.
• Credit notes.
• Debit notes.
• E-invoice records.

Purchase and ITC Documents

• Purchase register.
• Supplier invoices.
• GSTR-2B reconciliation.
• Payment proofs.

Accounting Records

• Ledger extracts.
• Trial balance.
• Financial statements.

GST Compliance Records

• Filed GST returns.
• Previous GST communications.
• Reconciliation statements.

Common Mistakes While Replying to GST Scrutiny Notice

1. Ignoring the Notice

Not responding within the given timeline may lead to further proceedings.

2. Giving a General Explanation

A reply saying only "difference is due to accounting reasons" is usually not sufficient.

The taxpayer should provide:

• Exact reason.
• Amount-wise reconciliation.
• Supporting evidence.

3. Not Attaching Documents

A written explanation without supporting records may weaken the taxpayer's position.

4. Accepting Liability Without Verification

Businesses should first verify whether the discrepancy actually represents tax liability.

Some differences may be due to:

• Timing differences.
• Reporting adjustments.
• Technical issues.

GST Scrutiny Compliance Checklist for Businesses

Receiving a GST scrutiny notice requires a systematic approach. Businesses should not respond only based on assumptions or without verifying their records.

A proper review process helps taxpayers prepare accurate explanations and avoid unnecessary escalation.

How Businesses Should Prepare Before Replying to GST Scrutiny Notice ?

A GST scrutiny notice should be treated as an opportunity to explain genuine differences rather than assuming immediate tax liability.

Businesses should follow a structured approach.

1. Analyse the Nature of Discrepancy

The first step is to understand exactly what the GST officer has questioned.

The taxpayer should identify:

• Financial year involved.
• Tax period involved.
• Return details mentioned.
• Difference amount.
• Reason for discrepancy.

For example:

A notice mentions a difference between GSTR-1 and GSTR-3B.

The taxpayer should not immediately accept the difference as additional liability.

Instead, the business should verify whether the difference occurred due to:

• Invoice timing.
• Credit note adjustment.
• Amendment entries.
• Reporting mistakes.

2. Perform Return Reconciliation

Before submitting a reply, businesses should prepare detailed reconciliation between:

• GSTR-1.
• GSTR-3B.
• Books of accounts.
• Sales register.
• Tax payment records.

A reconciliation statement should clearly explain:

A proper reconciliation makes the reply more effective and easier for authorities to verify.

3. Review ITC Eligibility

For ITC-related scrutiny, businesses should verify:

• Purchase invoices.
• Supplier details.
• GSTR-2B availability.
• Accounting entries.
• Payment records.
• Business usage of goods/services.

Example:

A business claims ITC of ₹8 lakh in GSTR-3B.

During scrutiny, the department observes that only ₹7 lakh appears in available records.

The taxpayer should review:

• Whether invoices were reported late.
• Whether suppliers filed returns later.
• Whether any credit was claimed incorrectly.

After verification, the business can provide an appropriate explanation.

4. Prepare Supporting Documentation

A GST scrutiny reply should be supported with documentary evidence.

Depending on the issue, documents may include:

For Sales Mismatch:

• Sales register.
• Tax invoices.
• Credit notes.
• Debit notes.
• E-invoice records.

For ITC Mismatch:

• Purchase register.
• Supplier invoices.
• GSTR-2B reconciliation.
• Payment proofs.

For Tax Liability Difference:

• GST payment challans.
• Return copies.
• Ledger extracts.

For General Explanation:

• Agreements.
• Contracts.
• Internal reconciliation reports.

GST ASMT-11 Reply and ASMT-12 Closure Process

After receiving GST ASMT-10 notice, the taxpayer submits a reply generally through FORM GST ASMT-11.

The reply should explain the discrepancy identified by the GST officer.

If the explanation is found satisfactory, the officer may inform the taxpayer and no further action may be taken regarding that discrepancy.

Where the explanation is not satisfactory or corrective action is not taken, further proceedings may be initiated according to applicable GST provisions.

After accepting the explanation, the proper officer may issue an order in FORM GST ASMT-12 confirming that the explanation has been accepted.

Practical Example: GST Scrutiny Due to ITC Mismatch

ABC Traders received a GST scrutiny notice regarding excess ITC claimed.

The notice mentioned:

ITC claimed in GSTR-3B:

₹12 lakh

ITC available as per department records:

₹10 lakh

Difference:

₹2 lakh

The business reviewed its records and found that:

• Certain supplier invoices were reported late.
• Some invoices were reflected in the next period.
• All purchases were supported with valid tax invoices.

The business prepared:

• Invoice-wise reconciliation.
• Supplier details.
• Purchase register.
• GSTR-2B comparison.

After submitting the explanation with documents, the discrepancy was properly explained.

This example highlights why businesses should perform regular ITC reconciliation instead of waiting until receiving a GST scrutiny notice.

Practical Example: GSTR-1 and GSTR-3B Difference Due to Reporting Error

XYZ Manufacturing Private Limited received a scrutiny notice for a turnover mismatch.

The department observed:

GSTR-1 turnover:

₹2 crore

GSTR-3B turnover:

₹1.85 crore

Difference:

₹15 lakh

During internal review, the company found that certain invoices were reported incorrectly due to:

• Year-end accounting adjustments.
• Invoice amendment issues.

The company prepared a detailed reconciliation explaining:

• Invoice numbers.
• Reporting period.
• Tax impact.
• Corrective action.

A proper explanation helped establish that the difference was due to reporting adjustments rather than undisclosed sales.

Difference Between GST Scrutiny and GST Audit

Many businesses confuse GST scrutiny with GST audit. Both are different compliance processes.

GST scrutiny is generally focused on verifying discrepancies in filed returns, whereas audit involves a deeper examination of records and compliance.

Difference Between GST Scrutiny and GST Assessment

GST scrutiny and assessment are also different concepts.

Common Mistakes Businesses Make During GST Scrutiny

1. Ignoring GST Notice

Some businesses delay responding because they assume the discrepancy is minor.

Ignoring a GST scrutiny notice can lead to further action.

Businesses should review and respond within the prescribed timeline.

2. Providing Generic Replies

A reply stating:

"Difference is due to accounting issues"

is usually insufficient.

A strong reply should include:

• Exact reason.
• Amount-wise reconciliation.
• Supporting evidence.

3. Not Reconciling Before Reply

Businesses should not prepare replies without checking their own records.

Internal reconciliation should be completed first.

4. Accepting Department Calculation Without Verification

Not every mismatch represents tax liability.

Differences may occur due to:

• Timing differences.
• Amendments.
• Credit notes.
• Reporting adjustments.

5. Missing Supporting Documents

A written explanation without evidence may not adequately support the taxpayer’s position.

Frequently Asked Questions (FAQs)

1. What is Section 61 of GST?

Section 61 of the CGST Act allows the proper officer to scrutinize GST returns and related particulars submitted by registered taxpayers to verify their correctness.

If discrepancies are identified, the taxpayer may be asked to provide an explanation.

2. What is GST scrutiny notice?

A GST scrutiny notice is issued when the department identifies discrepancies in GST returns.

It generally requires the taxpayer to explain differences relating to:

• Turnover.
• Tax liability.
• ITC.
• Other return-related information.

3. What is GST ASMT-10 notice?

GST ASMT-10 is a notice issued by the proper officer informing the taxpayer about discrepancies identified during return scrutiny and seeking an explanation.

4. What is the time limit to reply to GST scrutiny notice?

The reply timeline is specified in the notice.

Businesses should carefully check the date mentioned in ASMT-10 and submit their explanation within the prescribed period.

5. Does receiving GST scrutiny notice mean tax has to be paid?

No.

A scrutiny notice only seeks clarification regarding discrepancies.

If the taxpayer provides a satisfactory explanation with supporting documents, further action may not be required.

6. What are common reasons for GST scrutiny?

Common reasons include:

• GSTR-1 and GSTR-3B mismatch.
• ITC mismatch.
• Turnover differences.
• E-invoice mismatch.
• Tax rate issues.
• Return reporting errors.

7. How can businesses avoid GST scrutiny issues?

Businesses should:

• Reconcile GST returns regularly.
• Match books with GST filings.
• Review ITC before claiming.
• Maintain proper invoices.
• Perform periodic compliance checks.

Need Professional Help With GST Scrutiny Notice?

A GST scrutiny notice requires proper analysis, accurate reconciliation, and a well-supported response.

A small mismatch in GSTR-1, GSTR-3B, ITC records, or accounting data can create unnecessary compliance challenges if not explained properly.

FilingSuvidha helps businesses handle GST scrutiny notices, return reconciliation, ITC verification, and GST compliance requirements with expert support.

Our GST compliance experts can assist you with:

✔ GST ASMT-10 Notice Review
✔ GST Scrutiny Reply Preparation
✔ GSTR-1 and GSTR-3B Reconciliation
✔ ITC Reconciliation Support
✔ GST Return Error Analysis
✔ GST Compliance Review
✔ Tax Documentation Assistance

Received a GST scrutiny notice or facing a return mismatch? Get professional assistance from FilingSuvidha and resolve GST compliance issues with proper documentation and expert guidance.

Contact FilingSuvidha

📞 Phone: +91-9625995981
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