At the bottom of the Item List box click on Item and then New to add a new inventory record. From the options choose Inventory Part and then fill in the information, such as item and part number, purchase information, cost and other information requested. Click OK when finished. Add the item to the inventory. Click on Vendors and then Vendor Center from the top main menu. Click on New Transactions and click on Receive Items to enter inventory that you've already paid for. If you haven't paid paid, click on Receive Items and Enter Bill to add the time and generate a bill.