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Hi All,

I need some help to find/use the right hook in PrestaShop 1.7.6.

I want to automatically set the vat_number field for a new address in the checkout or creating a new address with a hook. Is this possible in PrestaShop 1.7.6?

I found the form in classes/form/CustomerAddressForm.php.

So I tried to set the field with the hook actionCustomerAddressFormBuilderModifier but it doesn't work.
 

public function hookActionCustomerAddressFormBuilderModifier(array $params)
    {
        /** @var FormBuilderInterface $formBuilder */
        $formBuilder = $params['form_builder'];
        
		$params['data']['vatnumber'] = $vatReference['vatnumber'];

        $formBuilder->setData($params['data']);
    }

All help is welcome.