There are several differences between statutory audit, tax audit, and GST audit. These are- Statutory audit is applicable to all companies whereas tax and GST audits are applicable to all companies and individuals. Statutory audit is mandatory for a company whereas both GST and tax audits are conditional. In the case of statutory audit, the report is submitted to shareholders whereas in the case of tax audit and GST audit the reports are submitted to the income tax department and CBEC, respectively.