Do I have to code every line item?
No. When your Officeworks invoice arrives in your In Tray, select Create New Spend Money or Link to Existing Spend Money.
In the Spend Money window, type or select the account number to categorise your purchase, selecting the account that best suits your line items (which have been imported from your Officeworks invoice).
Fill in any additional information you require and click Record to complete. Now every future Officeworks invoice will be auto-allocated to the same account number. See example below: