This is VERY interesting and thanks for sharing it! That was my impression too, although I didn't know the exact age custodianship would end. So I contacted the Trustee (Vanguard) and they assured me we can keep the Custodial Account as is for as long as we want. Indeed, they said some investors still have Custodial Accounts for their kids who are in their 40's! I was surprised by that, but that is what we were told. We don't intend to keep it this way until my son is 40, but we hoped we could keep it secret for 1 more year. In years past, we simply reported the Custodial 1099-DIV on our tax return via Form 8814. In 2018, he graduated college and has earned income from his job so he MUST file his own tax return this year. The issue for us was: Do we have to tell him about the Custodial Account so he can report it on HIS return, or can we keep it secret for 1 more year and report it on OUR return on grounds it is still a Custodial Account and not in his name alone? Also, he was still a "dependent" for about 9 months of 2018 - not sure if that changes anything.
