When a withdrawal occurs (cancellation of all courses for which a student was enrolled at conclusion of the Add/Drop period of a semester), there are no successfully completed courses for the semester. This will lower your Course Completion Rate and can result in suspension and/or loss of financial aid eligibility if you already had a low course completion rate or there are consecutive withdrawals over a number of semesters.
See the Satisfactory Academic Progress policy for information on how financial aid is calculated for withdrawals.