Enter a job or press F4 to select a job from a list. This is the job associated with the PO item line.
Depending on how the Job Cost module is set up, you might not be able to select a soft or hard-closed job. The status of a job displays in the lookup form when you select it using F4. The Allow Posting to Soft-Closed Jobs and Allow Posting to Hard Closed Jobs boxes on the Info tab of JC Company Parameters determine if you can post to hard or soft closed jobs.