Itr-3 - brokerage income

I am going to file ITR-3 for F.Y. 2016 - 17 using nature of business code 0402-Estate Agents since I am broker of real estate. What if I file my income tax return where I will write yes in column asking whether liable to maintain books u/s 44AA but in P & L A/c I will write total gross receipt earned and will show gross expenses @ 50%. Is this ok?