If the incoming shipment is from a previous order, when receiving and checking-in the items, you need to use the 'Receive and Check-in' function to update your inventory.
After the window's opened, select an open order from the Order NO. drop down, then you will be able to select items from that order to check-in.
Adjust the number in the "Receive Now" field if the receiving amount is in this shipment is less than the "Ordered" minus "Received" number.
Click on the "Receive" button at the button to finish this check-in process. After saving this check-in list, you can click on "Print Barcode" button to print barcode labels for those items that do not have vendor barcodes.