Subform Shows No Records [ Resolved ]

My main for, "Lots", has a subform, "Residents". I created them both from an Excel file at the same time. I later decided that I wanted "Residents" to be a subform. Getting things to link up properly was difficult. At first, the subform showed no records. Using Deluge, I can fix this by editing each of the Lots records. This is a painstaking process.

I have more data I want to bring in to make additional subforms. How can i do this so the linking works right away?