Gozel,
I trust you have some general ideas of what the exam will be about or asking.
In the time that you have you will definately want to PhotoRead the book a couple of times. And you will also want to do spot activation. Here and there in the book. I don't know how successful you will be with this suggestion as it will depend on you own trust for your own body mind connection.
For activation look at a chapter and ask will this be on the test, yes or no. Depending on your own signals I cannot tell you what they should be and I am expecting that you have learned a yes no response from your mind and have used that in areas other than PhotoReading. If not listen closely what's the first thing you hear yes or no. If you're visual you might have green or red flashing in your mind or it might be a symbol like a circle for no and sissors for yes. Body reaction, tingle in the right hand may mean yes (or no) for you.
If the answer is no let it go trust that you mind will come up with some answer if it does show up in the test. For yes activate that chapter. Make a mental note of the chapter heading/suject and hold that in your mind along with a question in mind like 'what do I need to know in this chapter in order to pass the test with my best passing grade?" Superread and dip, mind map what you've dipped. Remember it is important to be able to recall the chapter heading/subject as you do this as your purpose becomes the reason for activating this chapter.
If you activate with 3 x 20 minute blocks a day between now you should manage 3 to 4 hours and have about 9 mind maps. (make notes if you don't mind map) Naturally you do have the option of doing more activation than an hours worth a day.
I agree tax is a dense subject and changes every year.
Alex