If I fail in CA, then when can I do it again?

CA is such a course that it requires hard work and dedication towards the course. So, if you fail, it is okay and you can try in a better way.

CA CS and CMA, among all these professional courses, probability of getting failed is high, because of low pass percentage. So, I suggest you to be patient and never lose self-confidence. Prepare hard enough for your next attempt and give your best.