If a requisition associates with existing applicants, you will not be able to add assessment questions to the application. We do not allow modification to the application after a candidate applies. Since a candidate can only apply to a requisition one time, if someone updates a requisition after initial applications were received, it may show favoritism to those candidates that were able to answer additional questions.
If you need to add assessment questions to a requisition to which candidates have already applied, close out the requisition that is open and create a new requisition after you have added the assessment questions to the job in Job Master. The candidates can then reapply to the new requisition.