Requisitions that have been submitted first need to be recalled or rejected and then can be edited from within the Requisitions option, if needed.
How to edit a requisition after submitting:
For requisitions with a status of Approved or Pending: If requisitions are allowed to be recalled (as defined within the Requisition Options), and if an approved requisition has not yet been converted to a purchase order or a requisition is pending, the requisition can be recalled by the user who entered the requisition, and then edited and resubmitted. To recall (and then edit) a requisition, complete the steps for recalling a requisition.
For requisitions with a status of Rejected: If a requisition has been rejected, the requisition can be edited by the user who entered the requisition and then resubmitted, or else cancelled or deleted. To make changes to a rejected requisition and resubmit it, complete the steps for editing a requisition before submitting; otherwise, complete the steps to cancel or delete a rejected requisition.