Does business code 14005 comes under 44ad for itr-4

In the AY-18-19 I have submitted an IT return with ITR-4 because I have some salaried income and some freelancing income. Few days ago I got a notice from CRA that states "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.". As I am a web developer so I choose "14005-Other IT enabled services" business code for my freelancing income. It will be helpful if I get the information that does business code 14005 comes under 44AD for ITR-4. And what do I do to solve this when I have nothing in "response to notice u/s 139(9)" under the "e-File" section in income tax efilling website.