is it tax audit

In simpler words Tax Audit is collecting the details and information require to fill Form 3CD and 3CA or 3CB and to file return 

There are others thing also involved in Tax Audit 

The things i mentioned are just basic 

Tax Audit includes Assessing and verifying whether all incomes have been properly accounted on the basis of established accouting principles and ascertaining the profit disclosed have been properly taxed.

An Assessee who business turnover crosses 40lacs  or an assessee's profession gross receipts exceeds 10lacs, the person is eligible for an tax audit under section 44AB of The Income Tax act 1961.

To be more Precise, the tax audit is done and to be submitted in Form 3CD and Form 3CA or 3CB.

The tax audit is divided in 32 clauses, which is to be audited thoroughly.

this tax audit is signed by the partners of the firm.

the time taken to complete the tax audit depends on the size of the company and its nature of business.