Setting up taxes and tax rates is one of the first tasks you want to perform when setting up a store. However, the tax calculation gets carried out by WooCommerc. This document might help you further in how WooCommerce handles the tax : Therefore, the tax will be either calculated as per admin's location or customer's location. However, for a multivendor site, sometimes a vendor needs to earn tax as per the law in their own state. As a workaround, this following code will let the vendor add tax per product. This code will add a section like this scrrenshot : Now, this code will save the value. Now, we also add a checking, if a vendor hasn't added per product tax, then WooCommerce's tax rule will be applied. For this use this code : Here is a scrrenshot of the cart page :