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add_filter('woocommerce_product_get_tax_class', 'customize_tax_class_based_on_user_type', 10, 2);
add_filter('woocommerce_product_variation_get_tax_class', 'customize_tax_class_based_on_user_type', 10, 2);

function customize_tax_class_based_on_user_type($tax_class, $product) {
    // Get current user ID
    $user_id = get_current_user_id();
    
    // Check if user is B2B
    $is_b2b = get_user_meta($user_id, 'b2bking_b2buser', true) === 'yes';
    
    // If not B2B (i.e., B2C), adjust the tax calculation
    if (!$is_b2b) {
        // This filter will run when calculating ICMS tax
        add_filter('woocommerce_calculate_tax', 'remove_icms_for_b2c', 10, 5);
    }
    
    return $tax_class;
}

function remove_icms_for_b2c($taxes, $price, $rates, $price_includes_tax, $suppress_rounding) {
    foreach ($rates as $key => $rate) {
        // Check if this is the ICMS tax
        if (strpos($rate->tax_rate_name, 'ICMS') !== false) {
            // Set ICMS tax to 0 for B2C
            $taxes[$key] = 0;
        }
    }
    
    return $taxes;
}