Dear Sir,
Hope you are doing well !
Yes, you can take the benefit of presumption taxation scheme u/s 44AD.
Under Section 44AD, income would be presumed to be 8% of the total turnover.
Under section 80G, there is no defined maximum deduction limit. It all depends on the type of fund or institute you donate and sometimes also to your adjusted gross total income.
For determining exemption limit under section 80G you should classify donation in below 2 categories:
Eligible donation Without any Limit
Eligible donation With Limit of 10% of Adjusted Gross Total Income
Further, there is funds/institute in which 100% of contribution is allowed as deduction whereas in some other funds/institute deduction is limited to 50% of contribution.
Thanks & Regards,
Payal Chhajed