Where is the function that triggers shipping calculation on the Checkout.php page after selecting State or entering zip code?
Hi. Would you be able to tell me where the function that triggers the display of the (UPS) shipping cost on the checkout form after selecting a State or entering a zip code? I need to change it from State to State_2. I have a form where the id and name of fields is Postal_Code_2 and State_2. Thank you.