I have a documented disability. In order to receive accommodations, you must present appropriate documentation to the Coordinator of Services for Students with Disabilities.
Forms are available that show what is needed for appropriate documentation.
You then need to request an accommodation. The Coordinator will determine if that accommodation is reasonable based on the documentation, discussions with faculty if necessary, and the course in question. If appropriate documentation has been presented that demonstrates a need for testing accommodations, there are a couple of options. First consult with your professor to find out where the test will take place, either with the professor or in the Student Development Center. You should take their class syllabus which lists their test dates to the Student Development Center to schedule the entire semester's test dates.