In-depth defense guide for GST departmental audit u/s 65 & special audit u/s 66 in CG & Odisha. Master Form ADT-01, spot audit, ADT-02 & DRC-07 notice defense.
In This Article
8 SectionsIn recent months, tax offices across Chhattisgarh and Odisha have sharply intensified departmental audits under Section 65 of the CGST / SGST Act, 2017. Whether you operate a steel rerolling mill in the Urla or Bhanpuri industrial belts of Raipur, run a paddy processing facility in Kalahandi's Jayapatna block, or execute civil works contracts for PWD and railway divisions in Sambalpur and Cuttack, receiving a formal GST audit notice in Form ADT-01 is no longer a rare administrative event—it is an inevitable milestone in your business life cycle.
With central and state tax authorities relying heavily on business intelligence tools like BIFA (Business Intelligence and Fraud Analytics) and automated Red Flag Reports generated by DGARM (Directorate General of Analytics and Risk Management), audit selection has become highly targeted. Tax officers no longer conduct random inspections; they arrive at your factory gate or corporate desk armed with multi-year data cross-checks comparing your GSTR-1, GSTR-3B, GSTR-2B, Income Tax Returns (Form 26AS/AIS), and E-Way bill dumps.
For business owners and corporate finance teams, responding to a departmental audit without structured reconciliation and ground-level legal preparation can lead to massive tax demands, mandatory interest under Section 50, and harsh penalties under Sections 73 or 74.
In this defense guide, our senior GST practice team breaks down the end-to-end statutory procedure for Departmental Audit under Section 65 and Special Audit under Section 66, providing practical reconciliation blueprints, document checklists, and strategic steps to resolve audit observations before they turn into Form DRC-07 demand orders.
1. End-to-End Departmental Audit Workflow: ASCII Flowchart
To handle a GST departmental audit effectively, your accounts team must understand the step-by-step statutory lifecycle—from the moment an ADT-01 notice is generated to the final issuance of audit findings in Form ADT-02 or demand notices in Form DRC-01/07.
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| Risk-Based Selection via BIFA / Red Flag Analytics |
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|
v
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| Issuance of Audit Notice u/s 65(3) in Form ADT-01 |
| (Mandatory Minimum 15-Day Preparation Notice Period) |
+-------------------------------------------------------+
|
v
+-------------------------------------------------------+
| Taxpayer Submits Documents & Schedules Internal Gap |
| Reconciliation (GSTR-3B vs 2B, Sales vs P&L, RCM) |
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|
v
+-------------------------------------------------------+
| Desk Review by Audit Officers & On-Site Spot Audit |
| at Registered Business Premises / Factory Site |
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|
+-------------------+-------------------+
| |
[Records Clear / Simple Case] [Complex Case u/s 66]
| |
v v
+-----------------------------------+ +------------------------------------+
| Audit Team Formulates Draft Audit | | Special Audit Order u/s 66(1) in |
| Observations / Deficiency Sheet | | Form ADT-03 (Nominated CA Audit) |
+-----------------------------------+ +------------------------------------+
| |
v v
+-----------------------------------+ +------------------------------------+
| Taxpayer Submits Written Reply | | Nominated CA Submits Audit Report |
| with Reconciliations & Case Laws | | in Form ADT-04 within 90-180 Days |
+-----------------------------------+ +------------------------------------+
| |
+-------------------+-------------------+
|
v
+-------------------------------------------------------+
| Final Audit Findings Report u/s 65(6) in Form ADT-02 |
| Communicated to Taxpayer within 30 Days of Audit |
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|
+-------------------+-------------------+
| |
[Discrepancies Accepted] [Discrepancies Disputed]
| |
v v
+-----------------------------------+ +------------------------------------+
| Voluntary Settlement via DRC-03 | | Department Issues Pre-SCN DRC-01A |
| (Reduced Penalty / No SCN u/s 73) | | & Formal Show Cause Notice DRC-01 |
+-----------------------------------+ +------------------------------------+
|
v
+------------------------------------+
| Adjudication Order in Form DRC-07 |
| Creates Statutory Tax Demand |
+------------------------------------+
2. Decoding Section 65 & Form ADT-01: The 15-Day Preparation Window
Under Section 65(1) of the CGST Act, the Commissioner or any officer authorized by general or specific order can conduct an audit of any registered person for a financial year or multiples thereof. The audit can take place either at the place of business of the taxpayer or at the departmental office.
Key Trigger Points for Audit Selection
In our practice across Chhattisgarh and Odisha, we observe that the tax department selects units based on specific automated flags rather than arbitrary decisions:
- Significant ITC Mismatch: Persistent difference between Input Tax Credit claimed in GSTR-3B and credit available in auto-populated GSTR-2A/2B.
- Outward Supply Variance: Difference in turnover reported in GSTR-1 vs GSTR-3B vs Income Tax Returns (Form 26AS/TIS) or audited Profit & Loss Accounts.
- High Proportion of Exempt/Nil-Rated Supplies: Mills and traders claiming exempt sales (e.g., custom milled rice or unprocessed agricultural produce) without proportionate ITC reversal under Rules 42 and 43.
- RCM Non-Compliance: Discrepancy between freight expenses recorded in P&L and GST paid under Reverse Charge Mechanism (RCM) on Goods Transport Agency (GTA) services.
- E-Way Bill vs Turnover Mismatches: E-Way bill generation value exceeding outward turnover declared in GSTR-1, or movement of goods recorded without matching tax invoices.
Statutory Notice in Form ADT-01
Under Section 65(3) read with Rule 101(2), the department must issue a formal notice in Form ADT-01 at least 15 working days prior to the commencement of the audit.
Practitioner Insight: The 15-day period starts from the date of service of Form ADT-01 on the GST portal or via registered email—not when your accounts manager opens the notice. The moment Form ADT-01 lands on your dashboard, immediate internal preparation must begin. Do not wait for audit officers to step onto your factory premises.
What Should You Do During the 15-Day Preparation Window?
- Verify the Period of Audit: Form ADT-01 specifies the exact financial years under audit (e.g., FY 2021-22 to FY 2023-24). Gather data strictly for those periods.
- Perform 3-Way Reconciliations: Prepare detailed working sheets reconciling GSTR-1, GSTR-3B, GSTR-9, GSTR-9C, and Audited Trial Balances.
- Sanitize Expense Ledgers: Review all expense accounts (Freight, Legal Fees, Security, Rent, Director Remuneration) to confirm RCM tax compliance.
- Draft Legitimate Extension Requests: If your financial records are undergoing statutory income tax audit or key personnel are unavailable due to genuine reasons, submit a written representation seeking a short extension before the 15-day deadline expires.
3. Comprehensive Audit Readiness Document Checklist
When audit officers arrive for spot verification or initiate desk reviews, presenting neatly structured, pre-reconciled documentation creates credibility and prevents unnecessary fishing inquiries.
The following checklist details the exact documents our firm recommends organizing before the audit team arrives:
| S.No. | Category | Document / Register Required | Statutory & Verification Purpose |
|---|---|---|---|
| 1 | Financial Records | Audited Balance Sheets, P&L Accounts, Trial Balance, & Notes to Accounts | Verifying total revenue, scrap sales, other income, and expense ledger breakdowns. |
| 2 | GST Statutory Returns | Copies of GSTR-1, GSTR-3B, GSTR-9, and GSTR-9C along with DRC-03 payment receipts | Cross-checking monthly tax paid against annual reconciliation statements. |
| 3 | Credit Records | GSTR-2A vs GSTR-2B vs Purchase Register monthly reconciliation statements | Substantiating ITC eligibility under Section 16(2) and Section 16(4) time bars. |
| 4 | Outward Supply Registers | Sales Register, Tax Invoices, Debit/Credit Notes, and Export LOR/LUT details | Verifying applicable tax rates, place of supply, and zero-rated supply compliance. |
| 5 | Reverse Charge (RCM) | Ledger accounts for GTA freight, legal fee, security, advocate fee, and RCM vouchers | Confirming payment of cash liability u/s 9(3) and subsequent ITC claim. |
| 6 | Stock & Production | Raw Material & Finished Goods Stock Registers, RG-1/RG-23 registers, Yield Reports | Matching production outputs against raw material inputs (critical for steel mills & rice processors). |
| 7 | Logistics Records | E-Way Bill consolidated dumps, Delivery Challans, Weighbridge slips, Freight bills | Verifying physical movement of goods and detecting unbilled stock transfers. |
| 8 | ITC Reversal Worksheets | Calculations for exempt vs taxable turnover ITC reversal under Rules 42 & 43 | Validating non-claim of credit on common inputs used for exempt supplies. |
| 9 | Capital Assets | Fixed Asset Register, Tax Invoices for Machinery, and Depreciation Schedules | Ensuring no double benefit (claiming both income tax depreciation and GST credit u/s 16(3)). |
| 10 | Contracts & Agreements | Customer Contracts, Work Orders, Vendor Agreements, and PWD/CPWD Tender documents | Examining time of supply, mobilization advances, and retention money GST treatment. |
4. Execution of Departmental Audit: Desk Review & Spot Audit Procedure
Under Section 65(4), the audit must be completed within a period of 3 months from the date of commencement. The Commissioner can extend this period by a further maximum of 6 months for reasons recorded in writing.
Phase 1: Off-Site Desk Review
Before visiting your registered office or factory premises, the audit officers conduct an internal Desk Review at the GST Commissionerate.
- They examine historical GST filings, past assessment orders, and income tax tax-audit reports (Form 3CD).
- They generate ratio analyses such as ITC to Tax Liability Ratio, Gross Profit Ratio, and Yield Ratio (Output vs Raw Material Input).
- If you run a steel rerolling mill in Bhanpuri (Raipur), they compare your electricity consumption figures against finished steel output to detect potential un-recorded production.
- If you run a rice mill in Kalahandi, they match paddy received from Odisha State Civil Supplies Corporation (OSCSC) against custom milled rice (CMR) delivered, verifying milling charges and byproduct (husk/bran) tax treatment.
Phase 2: On-Site Spot Audit & Factory Visit
During the physical visit to your business premises, audit officers exercise powers under Section 65(5) read with Section 71 (Access to business premises):
- Verification of Books: They request physical access to books of accounts, Tally/SAP accounting databases, and original tax invoices.
- Physical Stock Inspection: Officers compare actual inventory in your warehouse against balances reflected in stock registers.
- Inspection of Production Logs: Verifying daily entry registers, weighbridge slips, and gate passes to match physical goods movement with tax invoices.
Ground Reality Advice for CG & Odisha Businesses: During spot audits, never present un-verified accounting drafts or loose papers. Designate a single experienced officer—such as your CFO or retained Chartered Accountant—to answer queries. Spontaneous, un-verified statements made by store managers or site engineers during a spot audit often get recorded in audit notes and cited as evidence of tax evasion.
5. Special Audit under Section 66: When the Department Nominates a CA/CMA
There are complex operational scenarios where the departmental audit team believes that books of accounts cannot be verified through standard departmental procedures. In such cases, the law empowers the department to initiate a Special Audit under Section 66.
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| Ongoing Audit u/s 65 or Scrutiny of Returns u/s 61 |
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|
v
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| Assistant/Deputy Commissioner Forms Opinion That: |
| - Value is not correctly declared, OR |
| - Credit availed is not within normal limits |
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v
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| Prior Approval Obtained from Worthy Commissioner |
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|
v
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| Direction Issued in Form ADT-03 to Taxpayer to get |
| Accounts Audited by Department Nominated CA/CMA |
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|
v
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| Nominated CA Conducts Detailed Audit & Submits |
| Special Audit Report in Form ADT-04 within 90 Days |
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Statutory Framework of Special Audit u/s 66
Under Section 66(1), if at any stage of scrutiny, inquiry, or audit, an Assistant Commissioner (with prior approval of the Commissioner) considers that:
- The value of taxable supplies has not been correctly declared, or
- The credit availed is not within normal limits,
the officer may direct the registered person in writing via Form ADT-03 to get their records audited by a Chartered Accountant or Cost Accountant nominated by the Commissioner.
Section 65 Departmental Audit vs Section 66 Special Audit
| Parameter | Departmental Audit (Section 65) | Special Audit (Section 66) |
|---|---|---|
| Auditor Conducting Audit | Departmental GST Officers (Audit Wing of Commissionerate) | External practicing CA or CMA nominated by GST Commissioner |
| Trigger Point | Regular risk-based selection via automated portal algorithms | Specific suspicion of undervalued sales or excessive/fraudulent ITC |
| Statutory Notice Form | Form ADT-01 (Minimum 15-day prior notice) | Form ADT-03 (Direction order issued by Deputy Commissioner) |
| Audit Report Form | Form ADT-02 issued by Department | Form ADT-04 submitted by Nominated Auditor to Assistant Commissioner |
| Time Limit for Completion | 3 months (Extendable up to maximum 9 months) | 90 days (Extendable by Assistant Commissioner up to another 90 days) |
| Audit Expenses & Fees | Borne by the Tax Department | Determined and paid directly by the Commissioner (No cost to taxpayer) |
6. Top 5 Audit Discrepancies Flagged in CG & Odisha & Defense Strategies
In our extensive tax litigation practice in Chhattisgarh and Odisha, we see audit officers consistently raising demands under five primary accounting heads. Here is how your business should prepare its technical defense:
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| TOP 5 GST AUDIT DISCREPANCY HEADS |
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| 1. GSTR-3B vs GSTR-2B Credit Discrepancies & Section 16(4) Time-Limit Bars |
| 2. Outward Turnover Reconciliation (GSTR-1 vs GSTR-3B vs Form 26AS / P&L) |
| 3. RCM Liability Defaults on GTA Freight, Legal Fees, Renting & Security |
| 4. Omission of Pro-Rata ITC Reversal for Exempt Supplies under Rules 42 & 43 |
| 5. E-Way Bill Quantity Mismatch against Physical Inventory & Stock Register |
+-------------------------------------------------------------------------------+
Discrepancy 1: GSTR-3B vs GSTR-2A/2B ITC Mismatch & Section 16(4)
- The Observation: Audit teams routinely compare total ITC claimed in Table 4(A) of Form GSTR-3B with GSTR-2A/2B statements, flagging any excess claim as illegal credit under Section 16(2)(aa). They also flag credit claimed after the statutory November 30 deadline for preceding financial years under Section 16(4).
- Defense Strategy: Prepare invoice-level reconciliation templates. Highlight delayed supplier filings where tax was paid to the government by the vendor, and rely on statutory amnesties and precedent judgments regarding procedural delays. Distinguish between genuine credit entitlement and administrative timing differences.
Discrepancy 2: Outward Supply Reconciliation (GSTR-1 vs P&L Sales vs Form 26AS)
- The Observation: Tax officers match total turnover in audited Profit & Loss accounts with GSTR-1 filings. Differences arising from scrap sales, asset disposal, interest income, or foreign exchange gains are flagged as suppressed taxable turnover.
- Defense Strategy: Maintain a clear Turnover Reconciliation Statement linking P&L revenue heads to GST returns. Exempt incomes (such as interest on fixed deposits or inter-company loans) must be clearly segregated from taxable sales. For civil contractors in Raipur and Odisha, reconcile gross contract values with TDS certificates issued under Section 51 of the CGST Act and Form 26AS.
Discrepancy 3: Reverse Charge Mechanism (RCM) Non-Compliance u/s 9(3)
- The Observation: Audit officers scrutinize expense ledgers—specifically freight and transport charges, legal fees paid to advocates, security service payments, and sponsorship costs. If GST was not deposited in cash under RCM, a demand is raised under Section 9(3) along with mandatory interest under Section 50(1).
- Defense Strategy: Verify whether freight vendors opted for the 12% forward charge mechanism (supported by Annexure V declarations on invoices). For items attracting RCM, ensure that cash payment was made via GSTR-3B and corresponding ITC was claimed in the same tax period (revenue-neutral scenario).
Discrepancy 4: Failure to Reverse Common ITC under Rules 42 & 43
- The Observation: Rice millers in Kalahandi (selling both taxable branded rice and exempt unbranded rice/husk) and manufacturers in Urla generating exempt byproducts frequently fail to reverse common input tax credit. Audit officers recalculate reversals for the entire financial year under Rule 42 (inputs/services) and Rule 43 (capital goods), imposing heavy differential demands.
- Defense Strategy: Compute Rule 42/43 reversals annually before GSTR-9 filing. Ensure that non-taxable transactions (like sale of land or high-sea sales under Schedule III) are correctly factored into the reversal formula to avoid departmentally exaggerated reversal calculations.
Discrepancy 5: E-Way Bill vs Physical Stock Register Variance
- The Observation: E-Way bills generated against your GSTIN are matched against sales invoices and purchase bills. If E-way bills exist without corresponding purchase invoices or vice versa, audit officers allege un-recorded purchases or clandestine outward removals.
- Defense Strategy: Maintain an E-Way Bill Reconciliation Log. Clearly document E-way bills generated for non-supply purposes—such as job work movement, goods sent on approval, movement between internal warehouses, or cancelled E-way bills where movement did not take place.
7. From Audit Observations to Form ADT-02: Avoiding DRC-07 Demand Orders
The ultimate goal during a departmental audit is to resolve audit observations at the preliminary stage and prevent the issuance of a formal Show Cause Notice (SCN) in Form DRC-01 leading to an adjudication order in Form DRC-07.
Step 1: Receiving Draft Audit Observations (Audit Spot Memo)
Before finalizing the audit report, the audit team issues informal Spot Memos or draft audit observations detailing proposed tax shortfalls, ineligible ITC claims, or interest liabilities.
Step 2: Submitting Written Representation & Legal Objections
Taxpayers are given an opportunity to file written replies to draft observations. Your reply must not be a basic cover letter—it should be a comprehensive legal representation containing:
- Invoice-by-invoice reconciliation schedules.
- Documentary proof of tax payment by suppliers.
- Statutory circulars issued by the CBIC clarifying controversial tax treatments.
- Precedents and judicial rulings from the High Courts of Chhattisgarh and Odisha, as well as the GST Appellate Authorities.
Step 3: Issuance of Final Audit Report in Form ADT-02
Under Section 65(6) read with Rule 101(5), the audit officer must inform the registered person of the final audit findings, rights, and obligations within 30 days of the conclusion of the audit by issuing Form ADT-02.
Form ADT-02 contains:
- Summary of audited financial years.
- Validated tax liabilities accepted by the department.
- Un-resolved discrepancies flagged for statutory adjudication.
Form ADT-02 Audit Findings Issued
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+----------------------+----------------------+
| |
[Taxpayer Accepts Discrepancies] [Taxpayer Disputes Findings]
| |
v v
Pay Tax + Interest via DRC-03 Department Issues Pre-SCN DRC-01A
(Concession on Penalties u/s 65(7)) & Formal SCN u/s 73 or Section 74
| |
v v
Audit Closed Without SCN Adjudication Proceedings &
Formal Order in Form DRC-07
Step 4: Strategic Use of Form DRC-03 for Voluntary Settlement
Under Section 65(7), where the audit report in Form ADT-02 detects tax short payment or improper ITC claim, the taxpayer can choose to pay the accepted tax liability along with applicable interest via Form DRC-03.
Strategic Tax Defense Rule: If an audit finding involves an undeniable accounting oversight (such as short-paid RCM on freight or clerical ITC over-claim), pay the liability voluntarily via Form DRC-03 before the department issues a formal Show Cause Notice under Section 73 or Section 74. Paying prior to SCN issuance minimizes statutory penalty exposure and avoids lengthy litigation costs.
If you dispute the audit findings on legal merits, do not accept Form ADT-02 findings blindly. Prepare your legal strategy for the upcoming adjudication stage under Section 73/74, where you will present oral and written arguments before the Adjudicating Authority.
Strategic Practice Callout: Departmental Audit Representation
Navigating a GST departmental audit under Section 65 or a special audit under Section 66 requires far more than basic bookkeeping—it demands deep technical knowledge of GST statutory provisions, forensic reconciliation capability, and ground-level legal representation before tax authorities.
At Rabi Agrawal & Associates, our tax practice team brings over 15 years of practical experience assisting industrial manufacturers in Urla and Bhanpuri (Raipur), rice millers across Kalahandi and Odisha, civil infrastructure contractors, and commercial enterprises.
How Our Practice Assists Your Business:
- Pre-Audit Health Checks: Conducting mock GST audits and multi-year 3-way reconciliations (GSTR-1 vs 3B vs 2B vs P&L) during the 15-day Form ADT-01 window.
- On-Site Audit Defense: Representing your corporate entity during departmental spot audits, handling officer inquiries, and presenting audit documentation.
- Technical Draft Replies: Formulating structured legal responses to departmental spot memos, audit deficiency letters, and Form ADT-02 audit reports.
- SCN & Litigation Defense: Defending your business against Form DRC-01 Show Cause Notices and pursuing appeals before Appellate Authorities in Chhattisgarh and Odisha.
Need Immediate Assistance with a GST Audit Notice? Contact our senior GST partners today to schedule a confidential audit defense review.
- Raipur Office (Chhattisgarh): Main Road, Urla Industrial Area / Pandri Commercial Complex, Raipur, CG.
- Kalahandi Office (Odisha): Main Road, Junagarh / Bhawanipatna, District Kalahandi, Odisha.
- Direct Consultation Email: info@carabiagrawal.com | contact@carabiagrawal.com
Authored by CA Rabi Agrawal & Practice Team
Rabi Agrawal & Associates, Chartered Accountants — Head Office Raipur (CG), Branch Office Jayapatna (Odisha).