INCOME TAX

YES. iF ANY ONE OF THE BUSINESS IS OFFERED TO TAX U/S 44AD, 44AE OR   44AF ETC, SUCH AS CIVIL CONTRACT, RETAIL TRADERS OR TRUCK OPERATORS WHICH IS TAXABLE UNDER PRESUMPTIVE BASIS AND TURNVOER FROM OTHER BUSINESS IS LESS THAN RS. 40 LAKHS, THEN TAX AUDIT IS NOT REQUIRED. IN THIS CASE BOTH ARE MANUFACTURING UNIT AND NOT COMING UNDER RETAIL TRADE. HENCE, BOOKS OF ACCOUNTS SHOULD BE AUDITED U/S 44AB

However the business under 44AD 44AE or 44AF should itself be below 40 lakhs. Then you can deduct the turnover of these and if balance is more than 40 lakhs then you need to audit.

yes

 yes he is liable for Tax audit u/s 44ab

yes

 Yes

His lotal turnover is from two business is above 40 Lakhs, so he is liablie to tax audit u/s 44AB