Yes, invoice summary can be used for bookkeeping purposes. In order to view the invoice summary, click on invoices from the left-hand side navigation and then click List.
A page similar to the below image will be displayed. The top section will display summary information on Total Invoiced (Sales) and Tax, Paid, Unpaid and Overdue amounts.
Finally, for reconciling purposes in your accounting software (eg: MYOB, Xero, etc), you can make journal entries per month or fortnight into bookkeeping software summary information.
💡 Note: Change the period using the date period selector to capture summary information.