First, technician college belongs to secondary vocational education school, which is equivalent to high school in academic qualifications.

Second, you graduated by correspondence for 22 years, so you are not an undergraduate. To be exact, it should be an undergraduate in adult education.

Third, fill in the form as clearly as possible. For example: graduated from technician college and studied as an adult undergraduate. High school education, undergraduate study. Wait a minute.

I wish you all your wishes!