нашел на просторах сети следующее и помогло:
было
if (isset($this->session->data['shipping_address'])) {
$this->tax->setShippingAddress($this->session->data['shipping_address']['country_id'], $this->session->data['shipping_address']['zone_id']);
} elseif ($this->config->get('config_tax_default') == 'shipping') {
$this->tax->setShippingAddress($this->config->get('config_country_id'), $this->config->get('config_zone_id'));
}
if (isset($this->session->data['payment_address'])) {
$this->tax->setPaymentAddress($this->session->data['payment_address']['country_id'], $this->session->data['payment_address']['zone_id']);
} elseif ($this->config->get('config_tax_default') == 'payment') {
$this->tax->setPaymentAddress($this->config->get('config_country_id'), $this->config->get('config_zone_id'));
}
стало
if (isset($this->session->data['shipping_address'])) {
if(isset($this->session->data['shipping_address']['zone_id']))$this->tax->setShippingAddress($this->session->data['shipping_address']['country_id'], $this->session->data['shipping_address']['zone_id']);
} elseif ($this->config->get('config_tax_default') == 'shipping') {
$this->tax->setShippingAddress($this->config->get('config_country_id'), $this->config->get('config_zone_id'));
}
if (isset($this->session->data['payment_address'])) {
if(isset($this->session->data['payment_address']['zone_id']))$this->tax->setPaymentAddress($this->session->data['payment_address']['country_id'], $this->session->data['payment_address']['zone_id']);
} elseif ($this->config->get('config_tax_default') == 'payment') {
$this->tax->setPaymentAddress($this->config->get('config_country_id'), $this->config->get('config_zone_id'));
}
