Posed this a few months ago, but did not ask for a specific book, chapter, verse citation.
Put in $10,000 into a 529 plan for granddaughter several years ago, plan now worth $20,000. If I take out $10,000 for non-qualified purposes (my own bank account), can I consider the entire withdrawn amount a return on investment with no capital gains? The reply here was no, you must take a pro-rata view, ie, $5000 is a return on the capital investment with a $5000 long-term capital gain.
Can someone give me a citation where that viewpoint is given? I have no problem understanding the approach, but would like an actual citation if possible.