This additional information might help in forming an answer to my question.
The Data Entry form needs to autopopulate that 12th field as "Y" if the following is true:
IF 1 OR 1 NA is completed AND 2, 3, 4, 5, 6, 7, 8, and 9 are completed AND 10 OR 10 N/A is completed AND 11 OR 11...