Explanation
The correct time and way for creating an Invoice is at any point after the Fulfillment Order is created, by customizing flow "Create Invoice". This flow is a core action that creates an Invoicerecord from a Fulfillment Order record, and updates the status of both records accordingly. The administrator can customize this flow to suit their business needs, such as adding conditions, actions, or subflows. Verified References:https://help.salesforce.com/s/articleView?id=sf.flow_ref_elements_om_actions_create_invoice.htm&

Explanation
The required amount of test code coverage when deploying an Apex class is 75%. This means that at least
75% of the Apex code must be covered by unit tests, and all of those tests must complete successfully.
Verified
References:https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_deploying_ant_depl

Explanation
Two APIs that an admin can suggest so that customers can initiate order cancellations and returns from the B2C Commerce storefront and have their action carry out the cancel and return operations in Order Management are:
Connect APIs. These are RESTful APIs that expose resources in Order Management, such as orders, payments, shipments, etc. They allow customers to perform CRUD (create, read, update, delete) operations on these resources from external systems, such as B2C Commerce.
REST APIs. These are HTTP-based APIs that enable developers to access data in Order Management using standard HTTP methods, such as GET, POST, PUT, PATCH, and DELETE. They allow customers to interact with Order Management resources using JSON or XML formats.
Verified References:
https://help.salesforce.com/s/articleView?id=sf.order_management_connect_api.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.order_management_rest_api.htm&type=5

Explanation
The object that the Ensure Funds Apex Flow action looks for when resolving Invoice balances associated with an Order Summary is Order Payment Summaries. This object represents the payments made for an order, and it has a lookup relationship to both Invoice and Order Summary objects. The Ensure Funds Apex Flow action uses this object to calculate the balance due for each Invoice and update its status accordingly. Verified References:
https://help.salesforce.com/s/articleView?id=sf.order_management_order_payment_summary.htm&type=5https: