How far are Zoho Books and Zoho Billing integrated?
If you are a Zoho Books user, you are all set to use Zoho Billing. There is no need to create a separate account and you don’t have to go through any steps to sync your Zoho Books account with Zoho Billing.
Zoho Billing is seamlessly integrated with Zoho Books. Any changes you make in Zoho Books will be instantly reflected in Zoho Billing and vice-versa.
To know more kindly refer our Zoho Books Integration Page.