If you need to take a psychology course for the third time, you cannot make that request in Banner. You will need to fill out the Psychology Department's Request for Approval to Repeat a Psychology Course .
You ALSO need the University's Repeat Limit Approval form, available on the Registrar's "Student Forms". You will need to take the form to your faculty advisor, who will talk to you about why you have had trouble with the course in the past and what you can do to succeed this time. The advisor will sign the form. You then need to bring it to the Psychology Office in 2224 ASH for signature by the Unit Head, and then to the Registrar's desk in the Student Services Building (150 STU).