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In India’s GST system, an assessment is a statutory route for determining tax liability; return scrutiny checks filed returns for discrepancies; an audit examines a registered person’s books and records; and an investigation is an enforcement inquiry into suspected non-compliance. These processes can lead to further action, but a notice or information request is not, by itself, proof that tax is due.
How the processes differ
“Assessment” is the broadest term. The Central Goods and Services Tax Act (CGST Act) provides for self-assessment and other statutory routes, including provisional assessment and assessment in specified cases. Scrutiny is one process within that wider framework; it is not the same thing as a tax audit or an investigation.
| Process | Purpose and trigger | What a business may receive or need to do | Possible next step |
|---|---|---|---|
| Assessment | Determine tax liability through a route provided in the CGST Act. | The requirements depend on the route. A communication or order may use an ASMT-series form or another statutory form. | Liability may be finalized, or further proceedings may follow if an issue remains. (CBIC, CGST Rules) |
| Return scrutiny (section 61) | Check returns and related particulars against information available to the officer. | ASMT-10 may identify discrepancies and ask for an explanation; the taxpayer ordinarily responds in ASMT-11. | If the explanation or payment is accepted, the officer may close scrutiny in ASMT-12. Unresolved issues may be taken further or referred for audit or investigation. (CBIC, CGST Rules) |
| Tax-authority audit (section 65) | Examine records, returns and related matters, such as turnover, exemptions, tax rates, input tax credit (ITC) and refunds. | An ADT-01 notice may be followed by verification of records and an opportunity to respond to discrepancies; findings are communicated in ADT-02. | Audit findings may lead to separate demand proceedings under sections 73, 74 or 74A, as applicable. (CGST Act section 65; CBIC, CGST Rules) |
| Special audit (section 66) | Use a specified chartered accountant or cost accountant to audit records when the statutory process is invoked. | A direction may be issued in ADT-03, with findings reported in ADT-04. | Findings may inform subsequent tax action. (CBIC, CGST Rules) |
| Investigation or enforcement inquiry | Inquire into suspected non-compliance and establish facts under the Act. | A business may receive specific information requests or summons. Inspection, search or seizure may be used only where the relevant statutory conditions and authority requirements are met. | The inquiry may close, or it may progress to a show-cause or demand process, or another lawful action. (CGST Act section 67; CBIC Instruction No. 01/2023-24-GST (Inv.)) |
These processes may occur in sequence or overlap in a business’s experience, but they are not interchangeable. For example, an audit finding is not itself a demand order, and an investigation is not a final adjudication of tax due.
What return scrutiny means for your business
Under section 61, an officer checks a filed return and related particulars against available information. If the officer identifies a discrepancy, the rules provide for a notice in ASMT-10 seeking an explanation. The taxpayer’s reply is ordinarily made in ASMT-11. If the explanation or any payment is accepted, the officer may conclude the scrutiny by issuing ASMT-12.
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If an issue is not resolved, the officer may take it forward under the applicable demand provisions or refer the matter for audit or investigation. The scrutiny communication is therefore a request to address identified discrepancies—not, on its own, a final determination that the amount in question is payable.
What to expect from a section 65 audit
An authorized officer may audit a registered person for a period at the business premises or in the tax office. The registered person must be informed at least 15 working days before the audit. Ordinarily, the audit must be completed within three months from commencement. The Commissioner may extend that period by up to a further six months if satisfied that the audit cannot be completed within three months and records the reasons in writing. For this timing rule, commencement is when the called-for records are made available or when the audit actually begins at the business premises, whichever is later. (CGST Act section 65)
The officer may verify source documents, books and returns, including information about turnover, exemptions and deductions, tax rates, ITC availed or used, and refunds. The rules provide for communicating discrepancies, considering the taxpayer’s reply and then finalizing findings. Within 30 days after the audit concludes, the officer must inform the registered person of the findings, rights and obligations, and reasons. (CGST Act section 65; CBIC, CGST Rules)
If the audit identifies potential unpaid or short-paid tax, an erroneous refund, or wrongly availed or used ITC, the authority may initiate separate proceedings under the applicable demand provision. The audit’s findings and a later demand proceeding are distinct stages.
What an investigation may involve
Section 67 gives officers specified inspection, search and seizure powers in defined circumstances. For example, inspection may be authorized where an officer of at least Joint Commissioner rank has reasons to believe that a taxable person has suppressed a supply or stock transaction, claimed excess ITC, or contravened the Act or rules to evade tax. The section also sets out conditions for search and seizure and for seizing records. These powers are not an unrestricted authority to search or seize whenever an investigation is opened.
CBIC Instruction No. 01/2023-24-GST (Inv.), dated 30 March 2024, gives directions to CGST field formations conducting investigations involving regular taxpayers. It calls for approval before an investigation is initiated in the covered circumstances, checks for whether another office is already investigating the same subject, and specific information requests and summons rather than “fishing” inquiries. It also says officers should ordinarily not seek information already available digitally on the GST portal, and calls for reasoned approval of summons that records why the requested material is relevant.
The instruction says: “An investigation initiated must reach the earliest conclusion which is not more than one year.” This is a direction to the field formations covered by the instruction, not a general statutory limitation period for every GST proceeding. The instruction concerns CGST formations; it should not be treated as an exhaustive statement of statutory rights or administrative practice for every State GST authority.
What to do when a GST communication arrives
- Read the entire communication. Record the issuing authority, GSTIN, tax period, section or rule, form number, issue raised, documents requested, reply route and deadline. Do not rely only on a portal summary.
- Check authenticity and service details. Verify the communication through the official GST system or the issuing office’s official contact channel, and keep the notice and proof of service.
- Preserve the records tied to the issue. Depending on the notice, these may include filed returns, ledgers, invoices, contracts, e-way bills, payment records, ITC support, reconciliations and earlier correspondence. Keep a copy of what you submit and when.
- Answer the point actually raised. For an ASMT-10 scrutiny notice, address each discrepancy with supporting evidence through the prescribed response route, ordinarily ASMT-11. If you accept a discrepancy and pay, document the payment and report it as directed.
- Prepare for the process named in the notice. For an audit, organize the underlying books and records and reconcile the relevant reported values, rates, exemptions, ITC or refunds. For an investigation request or summons, identify the stated legal basis and the specific information sought.
- Use the deadline in the communication and governing procedure. There is no single response period that applies to every GST notice, summons or other communication. If significant tax, penalty, search or seizure, or prosecution exposure is involved, seek advice from a qualified GST practitioner or tax lawyer familiar with the relevant authority and facts.
Which legal framework applies?
This explanation concerns India’s Central GST framework. The CGST Act and Rules are amended over time, and corresponding State, Union Territory and administrative procedures may matter in a particular case. Check the current consolidated legislation, applicable notifications, the notice itself and the authority that issued it before acting. CBIC describes its archived rules material as informational; older commentary may also use an outdated section map, including for demand proceedings. (CBIC, CGST Rules; Department of Revenue, tax information pages for CGST Act sections 65 and 67)
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