Departmental Audit (Audit by Tax Authorities)
This standard audit is conducted under Section 65 to confirm tax liability and compliance status. Authorities notify taxpayers 15 days in advance (Form GST ADT-01) and conduct the audit at the premises or office. Completion is expected within three months, extendable by six months. Outcomes are recorded in Form GST ADT-02, with discrepancies potentially leading to actions under Sections 73 or 74.
Statutory Audit (Withdrawn Post FY 2020-21)
Previously mandatory for taxpayers with turnover over ?2 crores to have accounts audited by CA/CMA and file GSTR-9C. After the July 2021 amendment, this requirement was removed, and taxpayers now self-certify GSTR-9C.
Special Audit
As per Section 66, if the Assistant Commissioner doubts a transaction or ITC claim, a special audit by CA/CMA can be requested. The audit must be completed within 90 days (extendable by another 90 days) and financed by the department. Results are documented in Form GST ADT-04.
Limited Scrutiny
Limited scrutiny targets specific discrepancies or mismatches based on analytics or departmental risk parameters, which are then selectively verified.
Taxpayer-Initiated Audit
Businesses can voluntarily perform internal GST audits to ensure compliance, enhance internal controls, and prepare for potential scrutiny.