If your business is selling goods through e-commerce operators such as Amazon, Flipkart, and other platforms, you need to specify the same in the invoices for GSTR-1 filing.
To enable e-commerce invoicing, go to Business Settings > Accounting & Inventory > Taxation & Billing >Enable E-commerce Invoices.
When you turn the toggle on, you will see a new field in your invoices where the details of your e-commerce operator will be shown. In case you want to hide these details from public view, you can also do that from the settings as shown above.
Once enabled, you will see an option called "Add E-commerce Operator" while creating invoices.
Click here and you will see an option to select your e-commerce operator as shown below.
Click on "Add New" if you have not already added the operator. You will see the following modal where you can add the name and GSTIN of your e-commerce operator. 
Once done, click on "Add Operator" to save it.
As you see below, all the e-commerce operators you add will be visible in the dropdown.
Once the invoice is created, the system will automatically categorize it into the proper GSTR-1 category. You can view the same in the invoice summary section.
This will also be automatically reflected in your GSTR-1 reports.
That's it. Enjoy seamless invoicing & GSTR-1 filing on Refrens!
Have questions? reach out to us on chat support or drop an email at care@refrens.com.