When can I take the APTD Exam? Teona McCutchen Updated November 21, 2018 16:00 Follow The APTD Exam is offered during several testing windows throughout the year. For the most current testing windows and registration deadlines, please see www.td.org/certification/aptd/exam. Related articles Where do I take the APTD Exam? I don't want to test during my scheduled test window. Can I change my testing date? How much does the APTD cost?