My question is how can I follow that SKU through the process of invoice, sales, ect. I have the SKUs entered. I want to be able to enter a SKU and see where that item was used when no longer a part of inventory. Once you add a SKU to an invoice, is there a way to track it without knowing the invoice number? Or to see if it maybe was adjusted from the inventory? The Product Service List does not show that information. It only shows the quantity left.