Users can select in the mobile app or web console which customer a transaction is Billable to, if the Xero integration is installed. You will then be able to run a "Recharge" report in Xero to see the amount you need to invoice to a customer.
The list of Xero Customers imports your Contacts from Xero at the point of setting up the integration. If you wish to add a customer to the list in Soldo, then click here.
Please note: You cannot disable or edit any Xero lists in Soldo, to prevent the integration breaking. If you wish to make any changes to a Xero list, you will have to do this in Xero.