One record from the parent_form is linked to multiple child_form records.    So the linkage between the two forms should be in an "associate form" ,right? Where do I find the information about this associate form?

Second,  for the child_form, can I create a lookup field called "parent_form_id", and have the field auto-populated, non-changeable,  with the parent_form ID field value for the parent_form record being updated?

Thanks!!!!