Yes, per the rules of the Adobe student discount, you can just put the date (month/year) you expect to be leaving the current school that you're in now, or whenever your current term of study or enrollment ends...
That would go for high school, middle school, primary school, etc., plus university or college, as well as post-graduate education.
Sorry for the bump, but this interests me as well, will the license end at that date?
No, it does not expire then. All Adobe education memberships are paid (or prepaid) on an annual (12-month) basis – so your academic license would end when your subscription term does...
However, because Adobe considers eligibility documents to be current if they are dated anytime within the past six months, then you may possibly be able to renew your plan at the student/teacher discounted rate even after graduation or leaving school.
Thank You! I figured it out once I actually placed my order.