In order to claim qualifying widow, it must be your child. A grandchild does not qualify you for that status.
References:
Instructions for Form 1040
About Publication 501, Dependents, Standard Deduction, and Filing Information, page 10
I am very sorry for your loss.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
