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GST audit, assessment and inspection are different processes under India’s Central Goods and Services Tax (CGST) framework. Assessment determines tax liability; an audit verifies records, returns and compliance; inspection is a separate statutory power that can be authorised when a prescribed officer has specified reasons to believe that evasion-related circumstances exist. Return scrutiny is another process altogether. The safest first step is to identify the statutory section and form named in your notice, rather than treating every GST query as an “audit”.
This guide explains what each process is designed to do, the forms and timelines a business may see, how the processes can relate to one another, and what to do when a notice arrives. The cited consolidated Act PDF is updated to 1 August 2021, so confirm the latest Act, Rules, notifications and the applicable state or central administration guidance before relying on a time limit or procedural detail.
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At a glance
| Name | Best for | Key spec | Checked |
|---|---|---|---|
| Assessment | Determining tax liability | Includes self-assessment, re-assessment, provisional, summary and best-judgment assessment | November 2026 |
| Return scrutiny | Explaining a discrepancy in a filed return | Section 61 process; ASMT-10 notice, ASMT-11 reply and, where accepted, ASMT-12 | November 2026 |
| Tax-authority audit | Verifying books, returns, turnover, tax, refunds, input tax credit and compliance | Section 65; at least 15 working days’ notice; ADT-01 and ADT-02 | November 2026 |
| Special audit | Independent examination of complex or revenue-sensitive records | Section 66 direction with prior Commissioner approval; ADT-03 and ADT-04 | November 2026 |
| Inspection | Investigating specified suspected evasion circumstances | Section 67; written authorisation to inspect specified places | November 2026 |
“Checked” refers to the research date, not a representation that the 2021 consolidated Act PDF contains every amendment through November 2026.
What does “assessment” mean under GST?
Assessment is the legal determination of a person’s GST liability. It is the process concerned with answering “how much tax is payable?” rather than merely checking whether records are consistent.
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The Central Goods and Services Tax Act, 2017 defines assessment as determination of tax liability under the Act and says it includes:
- self-assessment by the registered person;
- re-assessment;
- provisional assessment;
- summary assessment; and
- best-judgment assessment.
“assessment” means determination of tax liability under this Act and includes self-assessment, re-assessment, provisional assessment, summary assessment and best judgment assessment;
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That definition is broad. A routine return can contain a self-assessment, while a later statutory procedure can determine or revise liability in a different way. The word “assessment” in a notice therefore does not, by itself, tell you whether the issue began with a return discrepancy, an audit finding, an investigation or another provision. Read the section, period and requested action together.
What can an assessment lead to?
An assessment can determine an amount of tax liability under the provision used. It does not follow that every audit query or inspection automatically becomes an assessment, and the cited provisions do not establish one universal outcome for every case. A business should distinguish a request for information from a formal order or demand that determines liability.
Is GST return scrutiny the same as an audit or assessment?
No. Return scrutiny is a separate section 61 process in which the proper officer examines a filed return against information available to the department. It may ask the taxpayer to explain a mismatch, but it is not the same statutory exercise as the broader verification performed in an audit or the liability determination made by an assessment.
The rules prescribe a recognisable form sequence:
- Form GST ASMT-10: the discrepancy notice sent to the registered person.
- Form GST ASMT-11: the registered person’s explanation or reply.
- Form GST ASMT-12: used where the explanation is accepted under the rules.
A scrutiny notice can concern figures such as turnover, tax paid or input tax credit when those figures do not align with information available to the officer. Respond to each discrepancy with a reconciliation and supporting records, and identify any correction the law requires. If the explanation is not accepted, the matter may move into another statutory route; do not assume that replying to ASMT-10 itself closes every possible issue.
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The CGST Rules provisions on assessment and audit are the useful reference for the prescribed forms. Keep the notice, submission, acknowledgements and attachments together so the history is clear if a later proceeding refers back to the scrutiny.
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What is a tax-authority GST audit?
A tax-authority audit is a verification exercise. Under the Act’s definition, an audit examines records, returns and other documents to check the correctness of declared turnover, taxes paid, refunds claimed and input tax credit availed, and to assess compliance with the Act and Rules.
“audit” means the examination of records, returns and other documents maintained or furnished by the registered person under this Act or the rules made thereunder or under any other law for the time being in force to verify the correctness of turnover declared, taxes paid, refund claimed and input tax credit availed, and to assess his compliance with the provisions of this Act or the rules made thereunder;
In practical terms, an audit can test whether the books support the GST returns and whether the treatment of supplies, exemptions, rates, input tax credit and refunds is consistent. It is wider than checking one return line, but its statutory function remains verification. An audit finding is not itself a statement that every business must pay an amount; any liability must be determined through the applicable statutory process.
What notice and timing apply to a section 65 audit?
Section 65 provides a framework for an audit of a registered person:
- the business should receive at least 15 working days’ notice;
- the audit may be conducted at the registered person’s place of business or at the officer’s office;
- the audit is to be completed within three months of commencement; and
- the period may be extended by up to six further months for reasons recorded in writing.
After the audit concludes, the findings are to be communicated within 30 days. These figures come from the section 65 text in the CBIC-hosted consolidated Act and should be checked against the current provision before a business relies on them.
Which forms identify an audit?
The rules describe a section 65 audit notice in Form GST ADT-01. The verification can cover records supporting books, returns and statements, declared turnover, exemptions and deductions, applicable rates, input tax credit, refunds and other relevant issues. Findings are communicated in Form GST ADT-02.
When ADT-01 arrives, check the financial year or other audit period, the place and proposed dates, the records requested, and the officer’s contact details. Ask for clarification in writing if the request is unclear, while preserving the original data and a copy of everything supplied. A well-indexed response helps separate a genuine accounting difference from a tax-position disagreement.
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What is a special audit under GST?
A special audit is a distinct route for a case that calls for examination by a nominated professional accountant. Section 66 allows an officer not below the rank of Assistant Commissioner, with prior approval of the Commissioner, to direct such an examination when the case’s complexity or the revenue interest warrants it.
The direction is issued in Form GST ADT-03, and the findings are communicated in Form GST ADT-04. It is not simply a longer version of every section 65 audit: the statutory trigger and approval path are different. Read the direction carefully to see the records, transactions and period within scope, and coordinate access without altering source documents.
When can GST inspection powers be used?
Inspection is an investigative power under section 67, not a synonym for audit or assessment. The provision concerns specified circumstances in which the prescribed proper officer has reasons to believe that matters such as suppression of transactions, excess input tax credit, contraventions intended to evade tax, or goods and records connected with possible evasion exist.
A qualifying proper officer may authorise another officer in writing to inspect specified places. The authorisation and the statutory grounds matter: an inspection should not be described as a routine audit merely because officers ask to see records. The section 67 framework is separate from the section 65 notice and timing rules, so do not automatically apply the audit’s 15-working-day notice period to an inspection.
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When officers attend, verify their identity and the written authorisation as far as the law and circumstances permit, keep a contemporaneous log of people present and documents provided, and avoid obstructing the exercise of lawful powers. Preserve original electronic records and make a copy of any inventory, statement or acknowledgement you receive. Contact the authorised tax adviser or counsel promptly; the correct response depends on the wording of the authorisation and the facts.
What is the difference between assessment, scrutiny, audit and inspection?
The shortest reliable distinction is: assessment determines liability; scrutiny checks a filed return against available information; audit verifies records and compliance; inspection investigates specified suspected-evasion circumstances.
| Process | Core question | Typical scope | Common form or document |
|---|---|---|---|
| Assessment | What tax liability is determined under the applicable provision? | Self-assessment, re-assessment, provisional, summary or best-judgment routes | The form or order depends on the statutory provision used |
| Return scrutiny | Does the filed return match information already available? | Discrepancies in a return and the explanation for them | ASMT-10, ASMT-11 and, where applicable, ASMT-12 |
| Tax-authority audit | Do records support the reported turnover, tax, refunds, credit and compliance? | Books, returns, statements and related documents for the audit period | ADT-01 notice and ADT-02 findings |
| Special audit | Does a complex or revenue-sensitive case require a nominated professional examination? | The records and issues specified in the direction | ADT-03 direction and ADT-04 findings |
| Inspection | Are there specified grounds to inspect places connected with suspected evasion? | Specified places, goods and records within the written authorisation | Section 67 authorisation |
The processes can appear in sequence, but there is no rule that every scrutiny becomes an audit, every audit becomes an assessment, or every inspection produces a tax demand. The notice’s section, form, period and requested action are more reliable than the label used informally by a caller or employee.
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How should a business respond when a GST notice arrives?
Start by classifying the document, then build a controlled response. The following sequence works for most notices without assuming that the matter is already a demand.
- Record the source and deadline. Save the notice from the portal or official channel, note the reference number, date, issuing officer and response deadline, and check whether an attachment or annexure is missing.
- Identify the legal route. Look for the section cited and the form number: ASMT-10 points to return scrutiny; ADT-01 to a section 65 audit; ADT-03 to a special audit; a written section 67 authorisation indicates inspection. If the notice calls something an “audit” but cites another provision, follow the provision.
- Define the period and population. List the financial years, tax periods, GSTINs, branches, suppliers, customers and transaction classes covered. Do not send unrelated data merely because it is easy to export.
- Freeze the evidence set. Preserve the books, ledgers, invoices, e-way or shipping records where relevant, return files, reconciliations, credit calculations, refund workings, contracts and correspondence in their original form. Keep a read-only copy and an index.
- Reconcile before explaining. Tie the general ledger to outward-supply returns, tax-payment records, input-tax-credit claims and refund applications. Label timing differences, credit notes, amendments, reversals and exempt or non-GST items instead of presenting a single unexplained total.
- Answer question by question. Use the notice’s numbering, provide a short conclusion for each point, and cross-reference the exact file or page supporting it. If a record does not exist, say so and explain what alternative evidence is available; never create a backdated document.
- Escalate technical issues. Have a GST professional review positions involving classification, place of supply, exemptions, valuation, input-tax-credit eligibility, limitation or possible penalty exposure. A review is especially important before conceding a liability or signing a factual statement.
- Track delivery and follow-up. Obtain the portal acknowledgement or receipt, keep proof of submission, and maintain a calendar for additional queries, meetings and any findings or order that follows.
If an inspection is underway, add a separate incident log: time of arrival and departure, officers present, areas visited, systems accessed, documents copied and acknowledgements received. Cooperate with lawful directions while ensuring that the business’s authorised representative controls the production of records.
Which records should be ready for scrutiny or audit?
Prepare a period-indexed file rather than a box of unsorted exports. The precise request controls, but the audit description in the Rules indicates the importance of records supporting:
- books of account, trial balances, ledgers and financial statements;
- sales registers, purchase registers, invoices, credit and debit notes and contract terms;
- returns and payment challans, with reconciliations to the books;
- turnover exclusions, exemptions, deductions and rate decisions;
- input tax credit by supplier and document, including reversals and adjustments;
- refund claims and the calculations and evidence behind them; and
- prior correspondence, submissions and acknowledgements relating to the same period.
Maintain an index that maps each notice question to a document, data extract or explanation. Keep source-system exports with their metadata and protect personal or commercially sensitive information that is outside the request.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How current are the GST timelines and forms?
The official sources used here are the CBIC-hosted CGST Act and Rules. The Act PDF is labelled updated 1 August 2021, and the Rules page was available during research, but this article does not independently verify every amendment through November 2026. Before acting, check the latest official Act text, Rules, notifications, circulars and the administration named in the notice.
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How we picked the distinctions in this guide
The categories follow the statutory functions and procedures in the CGST Act and Rules: whether the process determines liability, scrutinises a return, verifies records, invokes a special professional examination or authorises inspection on specified grounds. Forms and time periods are included only where the cited CBIC material identifies them, and no performance or outcome statistics are implied.
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Frequently asked questions
Can a return-scrutiny reply prevent a later GST proceeding?
An accepted explanation may close the discrepancy identified in that scrutiny, and the Rules provide Form ASMT-12 for that situation. It does not create a blanket immunity from a different issue, period or statutory process, so retain the full submission and acknowledgement.
Does a section 65 audit notice mean the department has already found tax evasion?
No. The statutory description of audit is verification of records, returns and compliance. A notice identifies the audit exercise and its scope; it is not, by itself, a final determination that tax was evaded or that a particular amount is payable.
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Do not silently substitute a different period. Point out the discrepancy in writing, ask the issuing officer to confirm the intended scope, and preserve records for both periods until the clarification is documented.
Can an inspection request be handled like a normal document email?
Inspection involves a written authorisation and specified places, so the response should be coordinated in real time by an authorised representative. Keep a log of access and copies, preserve originals, and obtain professional advice promptly instead of sending an unreviewed bulk export.
Where can I verify the prescribed GST forms?
Use the CBIC’s Assessment and Audit Rules page and the current official GST portal instructions, then match the form to the section cited in your notice. Older guides can show superseded labels or procedures, which is why the notice and current official material should control.
Frequently Asked Questions
Can a return-scrutiny reply prevent a later GST proceeding?
An accepted explanation may close the discrepancy identified in that scrutiny, and the Rules provide Form ASMT-12 for that situation. It does not create blanket immunity from a different issue, period or statutory process, so retain the full submission and acknowledgement.
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No. The statutory description of audit is verification of records, returns and compliance. A notice identifies the audit exercise and its scope; it is not, by itself, a final determination that tax was evaded or that a particular amount is payable.
What should I do if the period in a notice is wrong?
Do not silently substitute a different period. Point out the discrepancy in writing, ask the issuing officer to confirm the intended scope, and preserve records for both periods until the clarification is documented.
Can an inspection request be handled like a normal document email?
Inspection involves written authorisation and specified places, so the response should be coordinated in real time by an authorised representative. Keep a log of access and copies, preserve originals, and obtain professional advice promptly instead of sending an unreviewed bulk export.
Where can I verify the prescribed GST forms?
Use the CBIC’s Assessment and Audit Rules page and the current official GST portal instructions, then match the form to the section cited in your notice. Older guides can show superseded labels or procedures, so the notice and current official material should control.




