Nancy, it sounds like you are running into a one-to-many situation, like lines on an order, and only a one-to-one can be seen in the ALE. This may be why you can't source the UDF, also, since there could be more than one state setup for taxes, each with its own WC code.
------------------------------
Michelle Taylor
ERP Consulting Manager, CS3 Technology
918-388-9772
------------------------------