You can edit this information if required. Additional fields that are filled in automatically are the Date fields which are populated based on the work date. You can edit the date fields accordingly, the Order Date defines the date the order was created in the system, the Document Date defines the date the related document was created.
The Due date will be calculated based on the document date by the payment terms. After you have finished with the purchase header it is time to add Purchase Lines. For each purchase line you will need to select the type of the line. There are 5 options, Comment, G/L account, Item, Fixed Asset and Charge Item. In the case of items, choose item from the list.