The file tpl_modules_checkout_new_address.php is loaded during the checkout process when a user needs to change their shipping information. I have replaced the fields this file contained, first name, address, etc.. with some custom fields and upon submission of this page after changing the address, no data is being inserted into the database and also none of the required information is checked for being null. Neither of these things are done inside this file as they are in tpl_modules_create_account.
Can anyone tell me what file(s) actually does the database inserts and required field checks for tpl_modules_checkout_new_address.php?
Thanks.



