TOEFL TOEFL scores are required for international applicants. Applicants to the College of Optical Sciences must have a score of at least 600 paper-based (PB) or 79 Internet-based (iBT). Submit your scores to the University of Arizona (code number 4832). All reported scores must be dated within two years of the proposed date of enrollment. IELTS Those who completed the IELTS must have a minimum score of 7. Have IELTS send official scores to Graduate Admissions, Administration Bldg. Room 322, The University of Arizona, P.O. Box 210066, Tucson, AZ 85721. GRE General GRE scores are only required for degree-seeking applicants (not certificate programs). Subject scores are optional.