The WebPlanex GST Invoice India app allows you to assign GST rates and HSN codes to custom products that are manually added to Shopify orders. This ensures that GST-compliant invoices are generated accurately for orders containing custom products.
Configure GST/HSN for Custom Products
Navigate to:
WebPlanex GST Invoice India app - Settings → GST Settings
You will find the following options:
-
Automatically Apply GST% and HSN from the First Product/
This option is enabled by default.
When enabled, the app automatically applies the GST rate and HSN code of the first product in the order to any custom products added to that order.
This is useful when all products in the order fall under the same GST category.
-
Set Dynamic GST/HSN (Product-wise)
If you want to assign GST rates and HSN codes separately for custom product, enable the Set Dynamic (Product-wise) option.

Steps:
- Open or create a Shopify order.
- Add the custom product to the order and save the order.
- After that, Open the WebPlanex GST Invoice India app and navigate to Orders.
- Locate the order and click the Setup GST/HSN button.
- Enter the required GST percentage and HSN code for the custom product and click Save.


Once saved, the GST rate and HSN code will be applied to the custom product and reflected in the generated invoice.

Note: Automatic GST/HSN Mapping for Future Orders
After GST and HSN details are saved for a custom product, the app remembers those values.
If you create another order with a custom product having the same name, the app will automatically fetch the previously saved GST rate and HSN code and apply them to the invoice.
This helps ensure accurate GST compliance while reducing manual work and speeding up invoice generation.