I have successfully set up PayPal IPN on my site and it’s working fine. From my PayPal account I have set options to asses shipping and tax calculations (only if it’s Iowa). But the only issue is, on the PayPal checkout page it’s asking me to enter the “ship to” ZIP code manually. If I enter and update it, only then is the net payable updated with the shipping and tax charges.
Is there any variable which I could use to send the “ship to” ZIP code which will work directly on the cart and make it auto calculate the charges and show it? I have tried both zip and address_zip variables. Neither of them worked.
By the way, I have multiple items in my cart so I am using the “cart” transaction type.
