Study material

I regret to tell you NO you must not use old material - you need to use the FA 2020 material for the March exam

I have Kaplan book which says FA 18 and book is valid up till March 2020 sitting, so no?

The answer is indeed no

Can we also use kaplan revision kit and OT lecture notes and videos to ace our exams.

You can use the material of any approved ACCA provider - which of course includes Kaplan, but it must be the FA 2021 material for the June exam.