The Item field on the JB Progress Initialize by Item form.

Enter the bill item to initialize or press F4 to select from a list of available items for the current billing. Alternately, select a contract item to initialize or press F4 to select from a list of available contract items.

Once you have selected the item to initialize, click Initialize Bill Item. The system initializes the selected item to the billing, updating the existing data for that billing as applicable.