I have a form that has 5 fields, 2 belong to one table and 3 belong in a separate table. How do

[EosFleet]

Just as the title says.  I have a form that looks like this

Company Name

Company Size 

Contact Name
Contact Email

Contact Phone

How can I have it set so that my form finds the single foreign key then passes those fields to create those records?

[TheTimeSavingCo]

For this you should be able to use an automation with a "Find Record" followed by an "Update Record" action