I did it that way.
Nope you don't have to fill that form
Thanks Jayesh,
I got confused cause of below reading on CIC web site..
"
What does the principal applicant do?
At this stage, the principal applicant must:
1. Sign the Application to sponsor, Sponsorship Agreement and Undertaking (IMM 1344)
2. Complete and sign the Generic Application Form for Canada (IMM 0008) and the Additional Dependants/Declaration (IMM 0008DEP) and include your accompanying and non-accompanying dependents on one form
3. Complete the Additional Dependents/Declaration (IMM 0008DEP) if more than five accompanying or non-accompanying family members exist (edited)
"