Defective return

I have received a notice from IT department for having filed defective return for AY 2017-18. The notice says: Error Code 86 As per Section 44AD(6) of the Income Tax Act, 1961, the provisions of Sec.44AD are not applicable to – (1) persons carrying on professions that are referred to in Sec.44AA(1), (2) persons earning income in the nature of commission or brokerage, and (3) persons carrying on any agency business.As seen from the return of income filed, the nature of business code mentioned is which falls in the categories mentioned above. Hence, the provisions of Sec.44AD are not applicable, in your case. Possible resolution: As the provisions of Section 44AD are not applicable, in your case, the claim of computing profits and gains of business on presumptive basis, under this special provision is not allowable. Hence, the above defect has to be corrected by way of computing the profits and gains of business under the normal provisions and not under Sec.44AD and offering the same. I am a salaried employee and sometimes I work as a commission agent . Wrongly i filed ITR4 later i got a notice to rectify the return .i rectified the return by filing ITR3 . Again i have got notice saying error code 86. Please let me know what am I missing.