Print doctab in FedEx EPL/ZPL label Work with Xadapter FedEx plugin https://www.xadapter.com/product/woocommerce-fedex-shipping-plugin-with-print-label/

functions.php

add_filter('wf_fedex_request','custom_label_orientation', 10, 2 );
function custom_label_orientation($request, $order){
    $fedex_settings = get_option( 'woocommerce_wf_fedex_woocommerce_shipping_settings', null );
    $selected_service = $request['RequestedShipment']['ServiceType'];

    $custom_services = $fedex_settings['services'];

    $shipping_charge = $order->get_total_shipping();
    $handling = $shipping_charge;
    // Cost adjustment %
    if ( ! empty( $custom_services[ $selected_service ]['adjustment_percent'] ) ) {
        $handling = $handling + ( $handling * ( floatval( $custom_services[ $selected_service ]['adjustment_percent'] ) / 100 ) );
    }
    // Cost adjustment
    if ( ! empty( $custom_services[ $selected_service ]['adjustment'] ) ) {
        $handling = $handling + floatval( $custom_services[ $selected_service ]['adjustment'] );
    }
    $handling = abs($handling-$shipping_charge);

    $request['RequestedShipment']['CustomsClearanceDetail']['CommercialInvoice']['HandlingCosts'] = array( 'Amount' => $handling, 'Currency' => get_woocommerce_currency() );

    $request['RequestedShipment']['RateRequestTypes'] = 'LIST';
    $request['RequestedShipment']['LabelSpecification']['LabelPrintingOrientation'] = 'TOP_EDGE_OF_TEXT_FIRST';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['DocTabContentType'] = 'ZONE001';

    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][0]['ZoneNumber'] = '1';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][0]['Header'] = 'Invoice';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][0]['DataField'] = 'REQUEST/PACKAGE/CustomerReferences[CustomerReferenceType="INVOICE_NUMBER"]/value';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][1]['ZoneNumber'] = '2';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][1]['Header'] = 'Customer';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][1]['DataField'] = 'REQUEST/SHIPMENT/Recipient/Contact/PersonName';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][2]['ZoneNumber'] = '3';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][2]['Header'] = 'Dept';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][2]['DataField'] = '';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][3]['ZoneNumber'] = '4';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][3]['Header'] = 'PO Number';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][3]['DataField'] = 'REQUEST/PACKAGE/CustomerReferences[CustomerReferenceType="P_O_NUMBER"]/value';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][4]['ZoneNumber'] = '5';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][4]['Header'] = 'Date';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][4]['DataField'] = 'REQUEST/SHIPMENT/ShipTimestamp';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][5]['ZoneNumber'] = '6';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][5]['Header'] = 'Wgt';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][5]['DataField'] = 'REQUEST/PACKAGE/Weight/Value';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][6]['ZoneNumber'] = '7';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][6]['Header'] = 'COD';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][6]['DataField'] = 'REQUEST/SHIPMENT/SpecialServicesRequested/CodDetail/CodCollectionAmount/Amount';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][7]['ZoneNumber'] = '8';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][7]['Header'] = 'Delivery';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][7]['DataField'] = 'REPLY/SHIPMENT/OperationalDetail/DeliveryDate';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][8]['ZoneNumber'] = '9';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][8]['Header'] = 'Shipping';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][8]['DataField'] = 'REPLY/SHIPMENT/RATES/PAYOR_ACCOUNT_PACKAGE/TotalBaseCharge/Amount';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][9]['ZoneNumber'] = '10';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][9]['Header'] = 'Special';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][9]['DataField'] = 'REPLY/SHIPMENT/RATES/PAYOR_ACCOUNT_PACKAGE/TotalSurcharges/Amount';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][10]['ZoneNumber'] = '11';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][10]['Header'] = 'Handling';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][10]['DataField'] = 'REQUEST/SHIPMENT/CustomsClearanceDetail/CommercialInvoice/HandlingCosts/Amount';
    
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][11]['ZoneNumber'] = '12';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][11]['Header'] = 'Total';
    $request['RequestedShipment']['LabelSpecification']['CustomerSpecifiedDetail']['DocTabContent']['Zone001']['DocTabZoneSpecifications'][11]['DataField'] = 'REPLY/SHIPMENT/RATES/PAYOR_ACCOUNT_PACKAGE/TotalNetCharge/Amount';
    
    return $request;
}