English Formal Letter format?

Tmarcus SG

Hi, I have some doubts on the format for formal letter. Is it like this? Please help correct me, my english exam is tomorrow and my english teacher chose to be absent on the last lesson..

Tan Marcus

99 Jurong East

Singapore 123456, #03-23

24 April 2012

Mr David Goh

Principal

Jurong East Secondary School

Singapore 678910

Dear Mr Goh

Re: English Letter Format

MyPillowTalks SG

Hello marcus, i hope you are in time to see this post before your test,

I have uploaded my secondary school's notes on EL letter writing and other formats, you can use it to study

Download it here: http://www.mediafire.com/file/jjkukdqdmkm/Westwoodsec_EL_Format.pdf

Hope it is the same as what your teacher taught you