If you want to track custom information in Sales is accomplished through user-defined fields (UDFs). You can set up UDFs to track information only in Order Entry, only in Point of Sale, or in both Order Entry and Point of Sale. Another benefit of UDFs is that you can use them to sort by in some Sales reports.

You can set up user-defined fields to appear in the header section (top portion of the sales entry window) which will apply to the entire transaction or in the detail section which will apply only to the specific line item.