Any person/ business entity carrying business where the total sales, turnover, or receipts exceeds Rs. 1 crore in a year should have a tax audit in India. As a professional, receipts over Rs. 50 lakhs makes you liable for tax audit. Here a professional includes an engineer, architect, and interior decorator, legal and medical professional and any other as notified by CBDT. For the complete list of professionals, you must refer to Rule 6F of the Income Tax Rules, 1962.