Before using this procedure back up your payer. From the AMS Payroll Menu select Payer>Payer Edit>User Defined Fields.  Select the one you want to delete by clicking it (it will be highlighted), on your keyboard: hold the CTRL button then hit the backspace key.  Click Delete UDF and Pack List.Removing a User Defined Field effects all checks that have been entered, make sure you verify all numbers and totals after doing this procedure.