Be aware that a trustee-to-trustee transfer is neither a distribution nor a rollover, so be careful of your terminology. Just because it was all done at the same custodian does not guarantee that they did a proper trustee-to-trustee transfer. If there was truly a rollover rather than a transfer, that implies that there was distribution that included your father's RMD that was ineligible for rollover. Hopefully TD Ameritrade does better than most banks that all too often inappropriately do a distribution and rollover because the bank reps are poorly trained.
