"Was all that time in the US?" Do I say YES, because my child goes to college in the US or NO because "in college" counts as living with me, internationally?

Generally, for tax purposes, a child attending college is considered to be temporarily absent from your home see IRS link here.

• This means that if your child is a full-time student and you provide more than half of their financial support, they are still considered to be living with you, even if they are physically in the US for college.
• So, you should  likely answer NO to the question "Was all that time in the US?" because your child's time in college counts as living with you internationally.

See rules for dependents here.