I need to know how we can create credit note through API in Dynamics 365 Finance and Operation. Do we need to add custom API for this or is there any api already available?
There is a custom service: check out AOT > Services > Services > FormLetterService.
But you may want to create something custom anyway. For example, I often see OData actions for posting of individual orders.
Under review
Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.