If you have not swiped your card at a printer there are several ways you can delete a print job. But the easiest way if you are still logged on is to open the Uniflow Output Manager.
Double click on the Green Printer icon on the bottom left of the screen .
Select RQM Jobs, and highlight the print job you want to delete, click on the red cross in the Delete column which relates to the job you want to delete.
You should then get a message asking if you really want to delete the print job, click ok to delete or cancel to not delete.

If you have swiped your card at the printers mindunit your print job is already on the printer and you will need to go on to the printer and cancel the job there.