guys, ik provisions in these subjects have changed over time, hence asking this... would going through past exam papers of law, taxation and audit be beneficial?
Yes definitely you should go through past exam papers. Change happens in few portions of the syllabus other than that the remaining portion is the same. Hence I'll suggest solve the questions it will give you confidence plus you'll get an idea as to what kind of questions are being asked.
solving previous questions will helps you to know how well u have prepared for exams how ever first refer to rtps given by icai for ammendmemts and later solve the questions