Check these QuickBooks reports to determine what you have and have not invoiced to customers.
The Unbilled Costs by Job report lists the costs you have assigned as Billable to a particular Customer or Job but you have not invoiced them for the reimbursable expenses. The report groups the costs by customer and job. If you are using QuickBooks for property management, it will show reimbursable expenses by Tenant, Unit, Property, and Property Owner.
The Transaction List by Customer report lists all customer-related transactions (invoices, customer payments, sales receipts, etc.) that occurred within a period of time grouped by customer and job. Double-click to open the transaction.