09-17-2021, 06:07 PM
You can't take A/AS level exams online. There are online A level courses for the subjects, but not the actual exam itself. As an adult test taker, you'll be considered a private candidate. You'll have to find a school that's able to register you for the A level exams and administer it to you. You'll find more information here.
https://www.cambridgeinternational.org/e...andidates/
https://www.cambridgeinternational.org/e...andidates/