Section 65 audit basics
A departmental GST audit is initiated through FORM GST ADT-01. The officer audits records, returns, books and documents and later communicates findings. Discrepancies may lead to tax, interest, penalty or show-cause proceedings.
Documents to prepare
- GSTR-1, GSTR-3B and GSTR-2B.
- Sales, purchase, input and stock registers.
- Bank statements.
- E-way bill records.
- RCM workings.
- Annual financial statements.
- Previous notices and audit reports.
Common audit findings
- Blocked ITC.
- Supplier cancelled or non-filing mismatch.
- Books turnover higher than GST returns.
- RCM not paid.
- GSTR-1 and 3B discrepancy.
- Export refund documentation gap.
Process
Read ADT-01
Confirm period and records requested.
Reconcile
Prepare books-return-ITC reconciliations.
Attend audit
Keep authorised person and records ready.
Respond to findings
Reply before demand escalates.
GST Department Audit Under Section 65: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
GST Department Audit Under Section 65: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for GST Department Audit Under Section 65
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.
GST Department Audit Under Section 65: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for GST Department Audit Under Section 65
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.
GST Department Audit Under Section 65: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for GST Department Audit Under Section 65
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.
GST Department Audit Under Section 65: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for GST Department Audit Under Section 65
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.
Frequently Asked Questions
1. What are the audit and accounting requirements for businesses dealing with GST Department Audit Under Section 65?
Businesses involving GST Department Audit Under Section 65 must maintain proper books of accounts under Section 44AA. A tax audit under Section 44AB is mandatory if turnover exceeds ₹1 crore (or ₹10 crore for digital operations).
2. Why is a UDIN mandatory for CA certifications related to GST Department Audit Under Section 65?
All CA-certified financial statements, net worth certificates, or audit reports for GST Department Audit Under Section 65 must carry a Unique Document Identification Number (UDIN) generated on the ICAI portal to be legally valid.
3. What is the due date for submitting the Tax Audit report?
The due date to file the tax audit report on the income tax portal is September 30 of the Assessment Year (one month prior to the ITR filing due date of October 31 for audited cases).
4. What is the penalty for not getting books of accounts audited?
Under Section 271B, failure to get books audited u/s 44AB attracts a penalty of 0.5% of the total sales, turnover, or gross receipts, subject to a maximum cap of ₹1.5 lakh (₹150,000).
5. What is UDIN and why is it mandatory for CAs?
UDIN (Unique Document Identification Number) is a unique 18-digit number generated by Chartered Accountants on the ICAI portal for every certificate, audit report, and document they sign, to prevent forgery and verify CA credentials.
6. What happens if a CA fails to generate a UDIN?
Documents signed by a CA without a UDIN are treated as invalid. If not generated within the 60-day window, the CA can face disciplinary action from the ICAI for professional misconduct.
7. What is a Statutory Audit under the Companies Act, 2013?
A statutory audit is a mandatory review of a company's financial records to verify they present a true and fair view. It is compulsory for all companies (Private Limited, Public, OPC) regardless of turnover or capital.
8. What is a Secretarial Audit under Section 204?
A secretarial audit is an audit of compliance with corporate, securities, and labor laws, conducted by a practicing Company Secretary (CS) who submits Form MR-3. It is mandatory for listed and large public/borrowing unlisted companies.
9. What are the thresholds for a mandatory Secretarial Audit?
Secretarial audit is mandatory for: (1) Listed companies. (2) Public companies with paid-up capital >= ₹50 crore or turnover >= ₹250 crore. (3) Any company with outstanding bank/public financial institution loans >= ₹100 crore.
10. What is CARO (Companies Auditor's Report Order)?
CARO is a set of compliance items that statutory auditors of companies must report on, covering areas like fixed assets, inventory verification, loans to related parties, statutory dues, and internal control structures.
11. Are LLPs required to undergo audits?
Under the LLP Act, 2008, an LLP must get its accounts audited if its annual turnover exceeds ₹40 lakh or if its partner contributions exceed ₹25 lakh.
12. What is an Internal Audit? Who is required to appoint an internal auditor?
An internal audit evaluates a company's risk management and internal controls. Under Section 138 of the Companies Act, listed companies and unlisted public/private companies crossing specific turnover or debt thresholds must appoint an internal auditor.
13. What is the difference between Form 3CA and Form 3CB?
Form 3CA is the audit report used when the business is already required to get its accounts audited under another law (like the Companies Act). Form 3CB is used when the audit is required solely under the Income Tax Act.
14. What is Form 3CD?
Form 3CD is a detailed statement of particulars containing 44 clauses that the tax auditor must complete, detailing business income, expenses, depreciation, MSME dues, TDS compliance, and tax adjustments.
15. Can a tax audit report be revised after uploading?
Yes, a tax audit report can be revised if there are changes in the accounts (like corporate restructuring) or adjustments due to subsequent notifications, certified by the same CA with a fresh UDIN.