We offer an option that retrieves the HSN code and GST rate using the product metafield, which will be displayed on the invoice.
To enable this feature, please adjust the GST settings in the dashboard by selecting the "Metafield" option. Then, enter the same namespace and key that you have created on your Shopify store to allow the app to fetch the necessary details.
For example, custom.hsn_code. The same should be done for the tax rate.
For more details, please check the below image.
