If its turnover is less then 1 cr. assessee can go for Presumptive taxtion U/S 44AD where 8 percent profit will be deemed his income and no deduction for sec 28 to 44D (like Depreciation) will be allowed. However, he can set off his lossess of other business and deduction under chapter VI A will be allowed..
No need to maintain books of accounts under 44AA in case of presumtive taxation...
If assessee wants to decalre profit less than 8 percent then section 44AB i.e, would be applicable..