Hii, i am facing problem to operate this. When i add new customer, there is no option to fill Gst no. There is no option of hsn code, and kgs. no option of sign in invoic

I'm here to assist you, Mohitkhanna1603-.

In the Customer information window, you'll have to select either GST registered - Regular, GST registered - Composition, or Deemed exports under GST registration type so you can enter the GSTIN. 

Let me also include this article to help you know more about GST: QuickBooks for GST.

Concerning the HSN code, you can only add it to the products and services. You can check this article for more information: How to add HSN and SAC codes to your products and services.

If you need more help, don't hesitate to let us know. We're available 24/7 to assist you. Take care!