Access your college's home page and review what their policy is regarding post admission testing. Some colleges require that all students take placement examinations, whereas others only require students to take them if they lack the high school coursework or have lower scores on their SAT examinations.
Review your scores and high school transcript to determine whether you are required to take any or all of the CPT at your college --- according to the guidelines specified on your college's website.
Contact your college and confirm that you are required to take those parts of the CPT, based on your assessment of your test scores and high school transcript. Make sure you know when and where to go for the test.