The Canada child tax benefit (CCTB) is a non-taxable amount paid monthly to help eligible families with the cost of raising children under 18 years of age. Family net income is one of the factors used in the calculation of your CCTB entitlement. The net income from their tax return is added to your net income to determine your family net income. You must live with the child, and the child must be under the age of 18;You must be primarily responsible for the care and upbringing of the child;You must be a resident of Canada; and you or your spouse or common-law partner must be a Canadian citizen, a permanent resident, a protected person, or a temporary resident who has lived in Canada for the previous 18 months, and who has a valid permit in the 19th month.The person who is primarily responsible for the care and upbringing of the child should apply for the CCTB. Your child only lives with you part of the time, see shared custody. Your child is living with you for a temporary period of time, for example over the summer holidays. Your current adjusted family net income is too high. We recalculate your entitlement every July based on your adjusted family net income for the previous year. If you are the parent of a newborn, living in a participating province, you may apply for the CCTB using the Automated Benefits Application (ABA) service. You will find all the information you need to use the ABA service in the provincial/territorial birth registration package provided by your province or territory.If you do not live in a participating province, you can apply online on My Account by using the Apply for child benefits service or complete Form RC66, Canada Child Benefits Application.
You can get the form through the following website procedure :-
a. http://www.cra-arc.gc.ca/ Select :- a.English
b. Apply for benefits
c. Canada child tax benefit (CCTB)
d. Application and eligibility
e. How do I apply for the Canada child tax benefit? and
f. download the Form RC66, Canada Child Benefits Application. Or directly the link - http://www.cra-arc.gc.ca/E/pbg/tf/rc66/README.html.

The filled form have to send to this address for Toronto - Sudbury Tax Centre ,1050 Notre Dame Avenue , Sudbury ON P3A 5C1 . You can select the address near your city using the web link - http://www.cra-arc.gc.ca/bnfts/on-eng.html. The customer care number is - 1-800-387-1193 . Normally the customer care center representative will talk only to mother of the children . Also we have to get ready the details like SIN card , PR Card or Landing paper copy if you have , Passport for date of birth , the date of arrival etc.. before you call .