A step-by-step description of the online application process:
DEADLINES
The deadline to apply to change your residency status during the fall or spring semesters is 30 days after the first day of classes.
The deadline to apply to change your residency status during the summer semester is 10 days after the first day of classes in whichever summer term you are first registered.
NOTE: Residency is not retroactive, as it only applies to the semester you apply for residency.