I have an individual who has a pair of Natural parents. They die before he turns 9, so his grandparents takes responsibility for him as Foster parents.
I know that I can register the facts in FTB - but I'm working on the online site. Can this fact be added here.
I think all you can probably do is add a comment about this. Or a census record or something. One of my great aunts was raised by her uncle, but my tree doesn't show anything different than the normal descent. I just noted the census record to that fact.