ITR 4 ke alawa kisi bhi ITR mein gst no. daalna compulsory nahi hai as such Par ITR 4 mein toh details daalni padegi GST ki Agar ITR 4 nahi hai toh chal bhi jaye shayad ITR 4 mein agar gst no. hai fir bhi nahi daala hai toh fir revise karna bhi ek option ho skta hai