Hi,
The limit of Rs. 2 crores is to be checked in aggregate for all businesses under the presumptive scheme under secton 44AD as amended by the Finance Act 2017.
Therefore, you can claim 8% (if receipts are by way of other means than ECS//account payye) / 6% (if all receipts are through ECS or account payee) income on the turnover in aggregate for all business.
So, it does not matter if you show the income details separately or not, income shall be 8%/ 6% only of the turnover aggregately for all businesses.
For Example Turnover of Business A = 150 lacs, Turnover of Business B = 120 lacs
Then income shall be calculated as normal provisions as assessee is not eligible for presumptive taxation under Section 44AD.