When to take the SAT Test this year

<p>Thanks for all your help guys (idream17,anialways fall2016parent )
I really want to order the SAT book but my father is of out of town and I need to wait. I took some practice tests and I have some difficulties in answering the writing section. Could you recommend books that specifically deal with writing?
I am also attending a summer program in the US in July (fully funded), hence I really want to make best use of my holidays and crack the SAT before my trip to US.
Furthermore, I learnt that NUS doesn’t require the SAT for Indian cbse students (only board marks are required). But having a good SAT score could increase your chances, right? Could you elaborate on the keys factors that make a good application to NUS Econ/ Biz school.
Thanks…</p>