In Synergy you will create bills for each supplier and subcontractor bill that you receive. The bills are entered in Synergy when you need to on-charge the expense to a client on a project invoice. The bills needs to be sent to Xero so that the bill can be paid. After you have created the required bill you can run Synergy Connect. The new bill data found in Synergy will be transferred to your accounting system, and matching bills are automatically created in your accounting system.