U/s 44AD you are not required to maintain full books of accounts, But u have to maintain sale, purchase details, creditors and debtors details along with bank and cash balances.
As per the Budget 2020, (i.e from FY 2020-2021 onwards), an assessee having cash receipts and payments not exceeding 5%, is not liable for tax audit if his turnover does not exceed Rs. 5 crores.