cic.gc.ca/english/information/applications/guides/5553E5.asp
You must fill in your family member info. Your spouse & son as per guide below
B – My family members
You must give information about your family members. Family members are your spouse or common-law partner, your own dependent children or those of your spouse or common-law partner and the dependent children of dependent children. A common-law partner is a person of the opposite or same sex who is currently cohabiting and has cohabited in a conjugal relationship with you for a period of at least one year.
Your family member will be considered your dependent child if that child:
A. is under the age of 22 and single, i.e. not married and not in a common-law relationship; or
B. married or entered into a common-law relationship before the age of 22 and, since becoming a spouse or a common-law partner, has:
* been continuously enrolled and in attendance as a full-time student in a post-secondary institution accredited by the relevant government authority and
* depended substantially on the financial support of a parent; or
is 22 years of age or older and, since before the age of 22, has
* been continuously enrolled and in attendance as a full-time student in a post-secondary institution accredited by the relevant government authority and
* depended substantially on the financial support of a parent; or
C. is 22 years of age or older, has depended substantially on the financial support of a parent since before the age of 22 and is unable to provide for him/herself due to a medical condition.
Children included in the application must meet the definition of “dependent children” both at the time the application is made and, without taking into account whether they have attained 22 years of age, at the time the visa is issued to them.
Include them on your application by providing their names and other information in the appropriate space on the application form. Indicate if your family members are currently in Canada.
Important: In order to benefit from provisions outlined in the Immigration and Refugee Protection Act and Regulations for spouses or common-law partners of workers or students, you must provide proof of your relationship and status in Canada. You must provide a marriage certificate and birth certificates for any accompanying family members. If you are in a common-law relationship and your common-law spouse will accompany you to Canada, you must complete the enclosed form, Statutory Declaration of Common-Law Union (IMM 5409) [PDF]. Also provide evidence outlined on the form to support your relationship.