Need help to file gst for items sold in ecommerce site

Padmanabhan (Others) (66 Points)

05 August 2018  

Hi, I need help in filing GST in the gst.gov.in site for item sold in eCommerce site. Say, I sold an item last month to an other state buyer for Rs.1000 which falls under 12% GST rate. 

Which section I need to fill in GSTR1 and GSTR3B. This is my first time filing GST so getting confused by seeing many options under GSTR1. Please guide me.