The principle applicant and the spouse of the PA has to complete
- complete the Additional Family Information [IMM 5406]
This is copied from the guide
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/guide-5772-application-sponsor-parents-grandparents.html
Additional Family Information (IMM 5406)
This form must be completed by:
- You, as the principal applicant, (you here means the PA, i.e. assuming that's your dad)
- Your spouse or common-law partner (whether accompanying you to Canada or not), and (I think this is your mom)
- Your dependent children aged 18 or over (whether accompanying you to Canada or not). (none according what you posted here)
SECTION A
Write the personal details for:
- yourself,
- If you are married and you were physically present at the marriage, indicate “married – physically present” in the marital status box
- If you are married and you were not physically present at the marriage, indicate “married – not physically present” in the marital status box
- your spouse or common-law partner, (if applicable)
- If you are married and your spouse was physically present at the marriage, indicate “married – physically present” in the marital status box
- If you are married and your spouse was not physically present at the marriage, indicate “married – not physically present” in the marital status box
- your mother, and
- your father.
SECTION B
Write the personal details for your children. It is very important that you list all of your children (even if they are already permanent residents or citizens of Canada). This includes:
- married children,
- adopted children,
- children of your spouse(step-children) or common-law partner,
- any of your children who have been adopted by others,
- any of your children who are in the custody of an ex-spouse, former common-law partner or other guardian.
You must answer all questions. If any sections do not apply to you, answer “
N/A”.
SECTION C
Write personal details about your:
- brother(s),
- sister(s),
- half-brother(s) and half-sister(s),
- step-brother(s) and step-sister(s).
SECTION D
After carefully reading the statements contained in this section, sign and date the declaration.
So just fill each form assuming you are THAT person. Like put in your dad as
you, then "your spouse" for your dad is your mom. Then the section B about "your children" is all children of your dad (including you). And so as siblings info in section C (your uncles and aunites)...
Repeat that for a copy of IMM 5406 for your mom.
This is ADDITIONAL family information. So since these forms are for the same application, some information is repeated. People listed in this form is for IRCC information. NOT that they will be included in the immigration application. (except PA and his spouse)