I have a screen that is based on each company name and a form that slides in.
I cannot filter the choice for the company selection to only show the company currently on the screen.
You don’t need a company choice. You can instead add the appropriate Value component for company which will pass the value through the form.
No, you add a Value component. Press the button to add a new component and you will see a bunch of options from the parent table listed as components.