Creating a new auto-renewing subscription in the Amazon Developer Console
Source: Amazon Help
Go to the Amazon Developer Console
Select your app
Define a title and an SKU for your IAP. This is the SKU of the group (similar to Apple subscription groups) that holds the different products (monthly, yearly, etc).
Define titles, descriptions and images that will be displayed in the store and set the translations to your markets.
Add new terms to distribute your products. A term is a time-based variation of your product within your group (weekly, monthly, yearly,etc).
This is the Term SKU you need to set inside the Purchasely Console to identify your Plan.
Set the pricing of your term
Submit your IAP
Your In-App Product should have the status Approved