I live in Etobicoke, Ontario I applied my citizenship December 2, 2008 and recevied my acknowledgement letter on May 05, 2009 explaining that it wil take about 12-15 months after receive this letter.

My planning to go backhome in November 6, 2009. I am afraid it wont come in my absence. Should I inform them that I m going backhome for 3 months ? or what should i do. any suggestion. Does anybody apply from etobicoke, kindly share with me.

Thanks.

It is important to inform them so that they don't schedule your test date during the three months you are not here.
If you don't inform then you should be ready to fly back within 2 weeks, assumig you have somebody here looking after your mails.
Good luck.