You can decline or reduce you loans on the Student Loan Confirmation page in MyUI.

If you reduce your loans, all of your loans will show as accepted and will be placed on hold.  It may take up to three business days for your cancellation/reduction request to be processed.  After the Office of Student Financial Aid processes your loan reduction request, only the loans you indicated you want to receive will appear as accepted.

Approximately one week after submitting your request, view your revised financial aid award notification on MyUI.