I have been classified as a nonresident, but I will be here 1 year before classes begin. Can I be classified as a resident?

Being in Arizona for 1 year does not necessarily make you a resident for tuition purposes. You will need to meet all three of the independent requirements: one year showing presence and intent, and two years financial independence, unless you meet one of the exceptions. Once a student has been classified as a nonresident by admissions, he/she would need to petition for change of residency in order to be classified as a resident.