You can enter the items you wish to include in the order, click on Complete but . just click on "Complete" (you do not have to enter the method of payment). When you are ready to continue just click on the "Transactions" Tab at the bottom of the screen and then click on the desired transaction. You will have the option to update, Complete, or Email the order. At this point you can use the update option to make any changes to the line items. You can also complete the order.