Can I upload the Bill Reference?

The Reference field is only available for Accounts Receivable invoices. For Accounts Payable invoices – Bills in the fmAccounting Link file – the Xero InvoiceNumber value is displayed as the Reference in the Xero interface. The _kp_BillID field from the Bills table is populating the InvoiceNumber in Xero which then appears as the Bill Reference (e.g. BL1305).