Expert Guide
A complete walkthrough — Gst Audit Support
Localised for Royapuram, Chennai — where high-volume B2B traders operate with daily-truck inward and outward movement and significant GSTR-2B reconciliation pressure.
Reading this guide locally — Across Royapuram, on the George Town-Tondiarpet corridor that passes through Royapuram. Practitioners note that Royapuram businesses in the wholesale arm find that high-volume wholesalers face GSTR-2B ITC mismatch notices ASMT-10 turnover variance enquiries and frequent e-way bill exceptions.
What is a GST audit and where does it sit in the compliance architecture
Self-certification under GSTR-9C and its audit interplay
Until Finance Act 2021 amendments, Section 35(5) had required certification of GSTR-9C by a Chartered Accountant or Cost Accountant for registered persons whose aggregate turnover exceeded the prescribed threshold. The Finance Act 2021 substituted Section 35(5) and amended Section 44, shifting GSTR-9C to a self-certified reconciliation statement filed by the registered person without third-party attestation, effective FY 2020-21 onwards (Notification 29/2021-CT). The reconciliation in GSTR-9C between audited financial statements and GSTR-9 annual return is now an internal-control disclosure; it does not substitute for departmental audit under Section 65. Audit teams treat GSTR-9C self-certified reconciliations as primary working papers — Table 5 (turnover reconciliation), Table 9 (tax payable reconciliation) and Table 12-14 (ITC reconciliation) become the starting points of Section 65 audit interrogation.
Comparative framework — VAT/CST audits versus GST audit
Pre-GST, the VAT regime in Tamil Nadu (Tamil Nadu VAT Act 2006) had an audit framework under Section 64 with mandatory CA audit certificates for dealers above prescribed turnover, and the Central Sales Tax framework had limited audit coverage focused on inter-State transactions. The GST framework consolidates and rationalises this — a single audit under Section 65 covers central, State and integrated tax dimensions; the cooperative-federal architecture under Article 246A and 279A means the audit can be conducted by either the central or State authority but not both (Section 6 cross-empowerment). The OECD International VAT/GST Guidelines emphasise audit-efficiency through risk-based selection and digital data analytics, both of which the Indian framework has incorporated through GSTN-driven analytics and the GSTR-9C self-certification feed.
Statutory framework under Chapter XIII of the CGST Act
The audit framework under the Central Goods and Services Tax Act 2017 is contained in Chapter XIII, comprising Sections 65, 66 and 71. Section 65 provides for departmental audit, Section 66 for special audit by a Chartered Accountant or Cost Accountant nominated by the Commissioner, and Section 71 for access to business premises by an authorised officer. The Empowered Committee 2009 First Discussion Paper had envisaged audit as the principal verification layer in a self-assessment regime, replacing the pre-GST pattern of routine assessment under the VAT/CST framework. The architecture is risk-based: not every registered person is audited; selection is driven by Section 65(2) read with internal CBIC risk-management directions which factor in turnover scale, sectoral risk profile, prior compliance history and reconciliation gaps surfaced in GSTR-9C self-certification. The audit-process closure under Section 65(7) feeds either into a no-objection certificate, a voluntary DRC-03 payment, or an SCN under Section 73 or Section 74 depending on whether tax has been short-paid, short-collected or wrongly availed as ITC.
Section 66 special audit by CA / CMA
Procedural sequence under Section 66(2) to 66(5)
Once the Section 66(1) opinion is formed and Commissioner's approval obtained, Section 66(2) requires the nominated Chartered Accountant or Cost Accountant to submit a report duly signed and certified, in such form as prescribed (Form ADT-04), within ninety days; this period can be extended by a further ninety days on application by the registered person or the CA/CMA, with the Commissioner's permission. Section 66(3) requires that the registered person be given an opportunity of being heard in respect of any material gathered on the basis of the special audit and proposed to be used in any proceeding against him. Section 66(4) clarifies that the expenses of the examination and audit, including remuneration of the CA/CMA, shall be determined and paid by the Commissioner. Section 66(5) preserves the proper officer's power to take further proceedings (SCN under Section 73 / 74) on the basis of the special audit findings.
Independence of Section 66 from prior audits or returns acceptance
Section 66(6) is a critical safeguard from the revenue's perspective — it provides that nothing in Section 66 shall be construed to debar the registered person from filing returns or paying tax, or to debar the proper officer from taking any action against the registered person under any other provision. The provision is non-derogating; a Section 66 special audit can be invoked even after a Section 65 departmental audit has been completed, where the proper officer forms a fresh opinion on value or credit complexity. Comparative jurisprudence in pre-GST excise (similar provision in Section 14A of the Central Excise Act before its omission) and service tax (Section 72A of the Finance Act 1994) had similar non-derogation features. The registered person's defence at the Section 66 stage rests primarily on the Section 75 opportunity-of-being-heard and the nature-of-complexity threshold.
Comparative framework — special audit in income tax and GST
The income-tax framework has a parallel under Section 142(2A) of the Income Tax Act 1961 — special audit can be directed where the Assessing Officer, having regard to the nature and complexity of the accounts, the volume of accounts, doubts about the correctness of the accounts, multiplicity of transactions in the accounts or specialised nature of business activity, is of the opinion that it is necessary in the interests of revenue. Pre-GST excise had Section 14A; service tax had Section 72A. The architectural unity across these provisions is that special audit is a complexity-triggered intervention requiring a substantive opinion plus a procedural safeguard. The OECD Forum on Tax Administration documents a similar 'specialist audit' tier in several mature tax jurisdictions, reserved for complex high-revenue cases.
ADT-01 intimation
Form, contents and statutory basis
Form GST ADT-01 is the audit-initiation intimation prescribed under Rule 101(2) of the CGST Rules 2017. The form is generated by the proper officer (or audit officer authorised by the Commissioner) and served on the registered person at least fifteen working days before the date proposed for commencement of audit. ADT-01 contains the GSTIN and legal name of the registered person, the period proposed to be audited (typically one financial year), the place where audit will be conducted (place of business or office of the proper officer), the date of audit commencement, and a schedule of documents to be made available — books of account, invoices, returns including GSTR-9 and GSTR-9C, declarations, internal-audit reports, agreements material to the tax position, and any other document the audit team specifies. The fifteen-day window is a statutory taxpayer right under Section 65(3) read with Rule 101(2).
Responding to ADT-01 — documentation readiness
Upon receipt of ADT-01, the registered person's first task is to map the document-schedule against actual maintained records and identify any gaps. Where records are incomplete (typically Rule 56 stock registers, Rule 89 refund working papers, or reverse-charge self-invoices under Section 31(3)(f)), the fifteen-day window is the opportunity for reconstruction. The Goetze (India) v CIT (2006) Supreme Court principle on the inability to make fresh claims outside the return framework (decided in the income-tax context) is sometimes invoked at the audit stage to deny ITC claims not appearing in original returns; the counter-position rests on Section 16(4) timeline arguments and the principle that audit is a verification not a re-assessment. Document submission within the fifteen-day window aligns the formal commencement of audit under Section 65(4) Explanation and tightens the three-month closure clock.
Seeking extension of the audit-commencement date
Where genuine grounds exist — pending statutory audit of financial statements, key personnel unavailability, or recent migration of accounting systems — the registered person can seek extension of the audit commencement date by written representation. The audit team has administrative discretion under Rule 101 to grant reasonable extensions, generally up to thirty additional days; longer extensions require Commissioner-level approval. The extension must be sought before the proposed commencement date and supported by documentary evidence (statutory auditor engagement letter, employee leave records, ERP migration plans). The OECD Forum on Tax Administration best-practice benchmarks recognise such extensions as a taxpayer-rights safeguard, balanced against the audit-closure timeline.
ADT-02 audit report
Disagreement options post ADT-02
Where the registered person disagrees with one or more ADT-02 findings, the response options are: (a) file a Section 75 representation seeking re-consideration before the SCN stage; (b) await the SCN under Section 73 or 74 and contest at that stage; (c) where the audit findings are perceived as jurisdictionally infirm, file a writ petition before the Madras High Court under Article 226 of the Constitution. The writ remedy is typically reserved for jurisdictional infirmities — absence of Commissioner approval under Section 66, breach of the Section 65(4) timeline, denial of Section 75 opportunity of hearing — rather than for merit-based challenges. The Aap and Co v UoI (Gujarat HC) and Asahi India Glass v UoI (P&H HC) lines of authority offer guidance on writ-jurisdictional questions in audit and assessment matters.
Form, statutory basis and contents
Form GST ADT-02 is the audit-closure report prescribed under Rule 101(5) of the CGST Rules and Section 65(7) of the CGST Act. Upon completion of the audit, the proper officer is required to issue ADT-02 within thirty days informing the registered person of the findings, the rights and obligations, and the reasons for such findings. ADT-02 captures the period audited, the audit observations under each verification head (turnover, ITC, refund, classification, rate, valuation), the proper officer's conclusion on each observation, the tax / interest / penalty quantum where applicable, and the rights of the registered person to dispute or accept the findings. The form is the formal closure of the audit cycle and the trigger for the next-stage decision — voluntary DRC-03 payment, SCN under Section 73 or 74, or no-action closure.
Reading the audit-observations and proper-officer reasoning
ADT-02 audit observations are structured around the verification heads — turnover under Section 9 read with Section 7, taxable value under Section 15, rate of tax under the rate notifications, ITC under Sections 16 to 21, refund under Sections 54 and 55, and miscellaneous compliance. Each observation typically includes the audit team's working, the discrepancy quantum, the section / rule under which the proposed addition is framed, and the proper officer's reasoning. The Kranti Associates v Masood Ahmed Khan (2010) Supreme Court principle on reasoned orders applies — the proper officer's reasoning must engage with the registered person's explanations and cannot be a mechanical reproduction of audit-team working. Where reasoning is absent or perfunctory, the registered person has stronger grounds in subsequent Section 73 / 74 proceedings or in a writ petition before the Madras High Court under Article 226.
What Royapuram clients usually ask next: Closer to Royapuram, where high-volume B2B traders operate with daily-truck inward and outward movement and significant GSTR-2B reconciliation pressure, which is why for Royapuram units balancing production cycles with monthly GST and quarterly TDS compliance.