I have a form where I need to input Invoices. First I need to input invoice number, this is primary key in table "Invoices".
That Invoice number also serves as a foreign key in table "Invoice Items", and those items will be inputted in the same form.
In other words what I need is a form that will create a record in "Invoices" and multiple records in "Invoice Items" with each record having Invoice# as one of the fields.