need help

I suggest that you first download our free Study Guide for Paper P4.

Have you watched our free lectures (especially the lectures that I have recorded working through several Question 1’s from recent past exams – in these I discuss the approach as well as working through the technical aspects)?

Otherwise it is really a question of getting as much practice as possible. I assume that you have a Revision Kit from one of the ACCA approved publishers (if not then you should get one)? If you have already worked through all the questions in this, then consider getting one from one of the other publishers so you then have more questions to practice.
Practice (and learning from the answers) is the most important thing of all.

Have you used the resources on the ACCA website – especially all of the technical articles?

The ACCA stopped publishing answers to every exam at the end of last year. They will not be publishing answers to the March exams – instead, after the June exams they will publish a selection of answers to both March and June (but not all of the questions and answers).