Hello Carsten,

Thank you for contacting us through zoho.es

Zoho offers Books as a standardized international product.
A local partner (such as myself) must then configure it for use in Spain.

You can find the details here:

https://zoho.es/books/verifactu-disponible-zoho-books-espana/
Although the article is in Spanish, you can use Google Translate to read it.

In any case, here is a brief summary: to adapt Zoho Books to the VeriFactu, you need a connector called B2Brouter, which is Zoho’s only official integration.

 In addition to your Zoho license, you will need to subscribe to the eDocExchange package.
This has a monthly or annual fee, plus a charge based on your transaction volume.
You can create a free B2Brouter account to review its pricing.

One piece of advice: depending on several factors, subscribing to Zoho One can sometimes be more cost-effective than purchasing Zoho Books and Zoho Inventory separately.
Zoho One also includes Zoho Mail and more than 40 other applications for a single subscription fee.

I hope you find this information useful.
Please let me know if there is anything else I can help you with.Regards, José Luis Vilar.