Oracle iStore integrates with many other Oracle applications to provide and extend its functionality; therefore, a large portion of your implementation will involve understanding, setting up, and maintaining the integrating applications. iStore's dependencies and integrations range from those applications that supply an underlying structure for your sites to those that extend its functionality and capabilities. The applications that provide structure are mandatory, while ones that enhance Oracle iStore are optional integrations.
Oracle E-Business Tax
Oracle iStore integrates with Oracle E-Business Tax to display calculated tax information (Tax codes, Tax rates & Tax amounts)  to customers. By default, Oracle iStore displays only cart-level tax data, but you can configure the pages to display tax data at the item level.
General Ledger
GL provides business unit information to Oracle iStore. You also set up currencies in GL.
If you are implementing Oracle iStore reports, then you must create a single  calendar with the periods types: Day, Week, Month, Quarter, and Year, in order for the reports to work. Or, if you do not want to add all of these periods to the GL calendar, for reporting purposes, you can create a separate calendar for Oracle iStore in GL with the required period types.

Human Resources Management System
HRMS stores information related to your organization. Use HRMS to set up employees and bill-to and ship-to countries.
Inventory
Oracle Inventory serves as the repository of products that can be sold through Oracle iStore. Before you can create products in Oracle Inventory, you must set up and define the category structures within which products reside.
In addition, several Oracle Inventory flags need to be set in order for products to display in the Oracle iStore Customer Application.

Order Management
Oracle iStore uses the Oracle Order Management suite of applications to:
• Process, record, and track customer orders and shipping details
• Set up basic pricing
• Set up payment and shipping options
Oracle Order Management integrates with Oracle iStore via Oracle Order Capture APIs and schema. Order information is communicated to Oracle Order Capture via the ASO_Update_Order API.
CRM Technology Foundation
Oracle CRM Technology Foundation provides the underlying technology stack for the Oracle HTML applications.
After this implementation, perform the Oracle iStore-related setups listed in the following sections:
Set up Host Configuration, Cookie Properties, Set up Look and Feel Property, Component Caches.