The Expense Report shows you all of your business expenses, sorted either by payee, category or month. You can also filter this report by Period, Brand, Payer and Expense Category.
You can find the Expense report in the Accounting section here in Reports.
NOTE: In order to view this type of financial information, you must be an administrator user.
You can find more information here on keeping track of expenses in Táve, including automatic expenses, manually logged expenses, uploading receipts and exporting expenses as a CSV.