Thank you, this was actually clear enough for me to understand that this becomes my ex-husband's problem (and my son's to some extent) and that I don't need to worry about it for my own taxes. I am aware of the limits of the 529 account, fortunately (in this sense) the total value of the 529 account is lower than the allowable Room and Board for my son's university for the whole year so there won't be an issue with this, but thank you for the heads-up. Have a great evening!
