While navigating the demo, I don't see a way to easily add new recurring items which need to be invoiced to customers on a yearly basis.
Example:
Customer A subscribes for service A in januari. This service will be invoiced yearly in januari.
Customer A subscribes for service B in februari. This service will be invoiced yearly in februari.
Customer A subscribes for service C in februari. This service should be invoiced on the same invoice as service B.
The only way I see to solve this is creating a recurring invoice for each client and each recurring period and add items to them.
Are there any other options?