Verifying RMD taken on deceased taxpayer

[Radio1926]

Part of my deceased father's 2024 RMD was dispensed to the adult children inheriting his assets. 1099-R forms were issued for the three children that received the distributions. How do I show on my father's tax return that his entire RMD was satisfied? What was dispensed to him while he was alive is different that the required total RMD.  The remainder was dispensed to his children.