How to add specific ID numbers for Products from Paypal Form

Hi,

I can't figure out how to add a specific product id number for this form so the form knows what product it's pulling from paypal.

I am not sure which ID number you were referring to. But what you can do is just add specific identifier like ID number to the items/products in the Payment Form. 

while in the Paymen wizard, you can add details in the Prodcut description/details option.

Hope this help. Please let us know if there is more we can help you with.