Subscriber tags not added to MailChimp via MC4WP Integration

Hi,

I assume you’re using the custom integration method?
The form ID won’t be available via an action argument, but it will e available via $_POST[‘_hf_form_id’]

add_filter( 'mc4wp_integration_woocommerce_subscriber_data', function( MC4WP_MailChimp_Subscriber $subscriber ) {

if (isset($_POST['_hf_form_id']) && $_POST['_hf_form_id'] == 250328) {
        $subscriber->tags[] = 'Tag 1';
    } else if (isset($_POST['_hf_form_id']) && $_POST['_hf_form_id'] == 250329) {
        $subscriber->tags[] = 'Tag 2';
}

    return $subscriber;
});

Hope that helps. If you have any questions, please let me know!