Even though you can apply to DSS and submit documentation anytime, the following are dates you should follow if you want to ensure that services will be in place when classes start.
SUMMER and FALL: All documents should be submitted and reviewed by April 15 in order to ensure that services are in place for Summer and Fall semesters. Be safe and bring in your documentation beginning in early March.
SPRING: All documents should be submitted and reviewed by October 31 in order to ensure that services are in place for Spring semester.