Talk to an advisor. But If you have it in your name for the

Benefit of the child and it is a qualified 529 plan it won’t impact your child’s fafsa calculation of expected family contribution until your grandchild actually taps into it. Then it will have to be considered as income. That is why most kids don’t use their grandparents’ 529s until they are junior or seniors

But please consult a financial advisor, as I did not even stay at a holiday inn express last night and my knowledge on the topic is only what I’ve learned based on my personal experience.