Hello Michaela and welcome to social work thread
I looked on the application guide and it looks like you would fill out for your spouse "Additional Dependants Declaration". I cut and paste from the application guide on cic site. http://www.cic.gc.ca/english/information/applications/guides/EG74.asp
Dependant(s)
You, the principal applicant must answer each question on behalf of each of your dependant(s).
Note: Remember that all questions in this section are about your dependant.
You can add up to five (5) dependants in this form.
To add a new dependant to the application, click the “Add Dependant” button.
To remove a dependant from the application, click the “Remove Dependant” button.
If you have more than five (5) family members, you must complete the Additional Dependants/Declaration (IMM 0008DEP) form for each additional family member in order to include everyone in your application.
Important
You must list all family members in your application for permanent residence, whether they are accompanying you to Canada or not. You must also provide details on family members whose location is unknown (including those missing or presumed dead). If you don't, you will not be able to sponsor family members at a later date if they are not listed on your application.Dependant's Personal Details
Question Action
1-9
Questions 1 to 9 are identical to the questions you answered for yourself. Refer to the previous instructions to help you answer the questions for your dependant(s).
10
a) From the list, select your dependant's relationship to you, the principal applicant:
•Adopted Child
•Child
•Common-law partner
•Grandchild
•Other
•Spouse
•Step-Child
•Step-Grandchild
b) Complete if you chose “Other”