Which ITR is to be filing

Namaskaram Mr.Ataur, 

The applicable ITR for your case will be ITR-4 and also ensure you continue to disclose your business income under 44AD section for at least 5 consecutive years , because if you fail to disclose under 44AD even for 1 year then you'll be not eligible to claim 44AD benefit for next 5 year's.

Hope the above info helps...