While you are enrolled in the ASCENT Program, you are considered as not having graduated high school yet (until you complete ASCENT). Therefore, since high school graduation is a DSF requirement, you will not become a DSF Finalist for the 2019-20 academic year. In other words, your years of DSF eligibility will not start until you complete ASCENT and are officially a DPS graduate.
HOWEVER, when you officially graduate high school after completing the ASCENT program, you should apply for DSF as a New Applicant. You will need to complete all of the DSF requirements to become a DSF Finalist and qualify for a scholarship award.