Defective return communication u/s 139(9) from Income Tax Dept

Dear Experts, I am a freelancer software developer having a proprietorship firm and has submitted ITR under 44ADA and recently has received communication from CPC u/s 139(9) that it is defective. Error code is 89- The provisions of Section 44ADA not applicable to the taxpayer. The nature of business code in Sch NOB is not a profession, and the income disclosed under Section 44ADA income is more than zero. Hence the provisions of Section 44ADA is not applicable to the taxpayer. Probable resolution given is : The provisions of Section 44ADA is applicable only to Professionals with nature of business codes of 601 to 607.Taxpayer is requested to furnish correct Return Form type, i.e.ITR- 3 or ITR- 5 as applicable. If the Income has been disclosed under incorrect Section, the correct Section of the Schedule BP may be filled. If the Nature of Business code entered in the Return filed is not correct, the correct nature of business Code may be entered in the Sch NOB and the Corrected Return may be filed. On cross verification, I found that I had selected 0711-Software development agencies, as my nature of business. Should I change it to - 0607 Professionals [Others]? And do I have to write anything in Tradename boxes? Kindly advise urgently my next course of action. Regards, Indrani