I asked this earlier and have figured some of it out but still need some help. 

Client sold a rental home. Received $300k in cash at closing. $200k went to the 1031 Exchange broker, and $100k went to the client. $100k is taxable boot. 

Where is this entered on 8824, and how do I get it to flow to 4797 (If necessary) This is a new client so I don't have all of the historical data. 

Thank you!