Salesperson & Assign to a Form
At your form editing mode, at Form tab, check on 'Use WhatsApp Number from Sales Team'. After that, check your desired person number. And then hit save.
In case of selecting more than one sale person, the form will rotationally use the WhatsApp numbers.
For example: a form with 3 numbers. For the first order, it will be routed to the first person. Second order second number. Third order will be third number. And then, the forth one will be back to the first number. This will happen on and on.