The product SKUs can be associated with the required shipping codes of your web store in the following methods:
- i) Through the Add/Edit Product page while adding the new products/editing existing products:
Here, you can associate the 'shipping codes' to a single product.
- ii) Through the Bulk Product Upload interface:
Here you can associate the shipping codes to multiple products.
- iii) Through the Manage Shipping Codes page:
Here you can exclusively associate the multiple products (SKUs) with the selected shipping code.
Please refer: Associate SKUs with the Shipping Codes