Easybill is an online invoice software that can also be used to send ZUGFeRD and XRechnungen.
Version 1.0:
we connect Modified E-Commerce with Easybill.
When a purchase is made, we check whether the customer's email address already exists in Easybill. If not, we create the customer.
We then create the purchase and generate an invoice, but do not send it automatically.
Further updates and extensions according to your feedback and wishes.