Dependent Child of a Depenent Child or Spouse | Qualified Dependent

QUESTION: My wife has a son from her previous marriage. Can I include her son as my dependent for our permanent residence visa application?

ANSWER: You may include all your family members in your application. Family members include a spouse, a common-law partner, dependent children, and the dependent child of a dependent child.

Dependent child of a dependent child refers to children of dependent children of the principal applicant or those of his or her spouse or common-law partner.

Yes, you may include your wife's son as a dependent or family member.

Reference: Guide 7000