Physical Inventory

Our company went live on Business One 3 weeks ago. We will be doing a physical inventory at the end of this week. Our physical inventory process has always included controlled, pre-numbered inventory tags that are filled in with Item Code, Item Name, Batch #, Bin Location, Quantity. These tags were then input into our legacy system and used for reporting, tracking and reconciling the physical inventory. There does not appear to be a method for using tags in Business One. Are there other companies using Business One who use tags to perform a physical inventory? How/where do they record the tag number? I could add a user-defined field, but don't know where to add one (don't see a Physical Inventory section under UDF management).