Hi Shrikrish,
I haven't seen any full list of all the entities and data fields in Talent, but if you have Core HR you can find the System administration > Links > Office Integration > Document templates/Excel workbook designer - there you can find most of the entities and fields. That is the list that I have found the most information from.
Or
Go in PowerApps and try to connect to Talent - there you can find the entities and fields you can use for integration.
I tried to list all entities once, but I think there are some missing - Talent is a huge system if you are using all of it, and it is a lot to list.
