My dependents are my grandchildren , i have legal guardianship they are not adopted or foster kids how do i answer the part where it asks who children r they

[PatriciaR]

Here are the steps to correctly identify the Grandchildren.

While signed into your account,

Go to the Personal Info tab (top left)

On the page that asks "Who do you support" select "Another person" and you will get a dropdown box and you will select Grandchild (click on screenshot below for detail)