Finch's Landing is the original homestead of Simon Finch, the founding member of the Maycomb family central to the novel To Kill a Mockingbird. Finch's Landing is situated 20 miles west of Maycomb, and its primary residents were Atticus's sister, Alexandra, and her "taciturn" husband, Jimmy. Simon Finch had left his English home due to a mild form of religious persecution, immigrating to Philadelphia and then Jamaica before settling on the banks of the Alabama River. The plantation home was originally self-sufficient for the most part, worked by slave labor, and needing only a regular infusion of "ice, wheat flour and articles of clothing, supplied by river-boats from Mobile. The main house was two-storied, with porches upstairs and downstairs running around the entirety of the dwelling. There were six bedrooms upstairs with a master bedroom downstair, while the kitchen was located in a separate building.
Finch's Landing is also important for what it represents. The fact that the Finch family has some sort of a name or a history is very important in this piece. They are a family that is not from outside, so they should know how to behave, but they don't. Atticus is a bit of a rebel, albeit a quiet one. He is as removed from Finch's landing as he can possibly be and he does not require that Jem and Scout live up to the expectations of "Finch behavior" as is clear when the family visits the landing.
Aunt Alexandra and her husband do live at Finch's Landing and they are representative of an entirely different set of social and, to some degree moral behavior patterns. When Scout and Jem visit there at Christmas this is evident in the interaction that they have with their cousin Francis who is also representative of what can best be described, perhaps, as pretentious and self-centered behavior. The Finches of Finch's Landing put on airs.
When Aunt Alexandra comes to stay with Jem and Scout, as well, the difference in the rules and expectations is evident. Aunt Alexander wants Scout to attend tea, wear proper dresses, and behave like a lady - in other words, to be a proper Finch, but Scout is having none of it.
In this regard, Finch's Landing represents two different belief systems as well - the past and tradition which supported segregation and racial prejudice versus the newly emerging ideologies of the future that are shown not only in Atticus but in Jem and Scout who will presumably carry them on to future generations breaking away from the narrow-minded ideologies that Finch's Landing represents.
I hope you mean "identify" Finch's Landing. I've changed your question to that...
Finch's Landing was the homestead or farm (sounds more like a small plantation) that Atticus's ancestor Simon Finch founded. Simon Finch came to the area as an apothecary -- a medical man. He got rich enough that he was able to buy some slaves and found Finch's Landing.
The plantation did quite well and all Finch's descendents were able to make their living from the cotton it produced. It got destroyed during the Civil War, but even so, Atticus was the first Finch not to have the Landing as his main line of work.