first upload all files

Modules/Tax/Http/Controllers/Admin/TaxController.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace Modules\Tax\Http\Controllers\Admin;
+
+use Modules\Tax\Entities\TaxClass;
+use Modules\Admin\Traits\HasCrudActions;
+use Modules\Tax\Http\Requests\SaveTaxRequest;
+
+class TaxController
+{
+    use HasCrudActions;
+
+    /**
+     * Model for the resource.
+     *
+     * @var string
+     */
+    protected $model = TaxClass::class;
+
+    /**
+     * The relations to eager load on every query.
+     *
+     * @var array
+     */
+    protected $with = ['taxRates'];
+
+    /**
+     * Label of the resource.
+     *
+     * @var string
+     */
+    protected $label = 'tax::taxes.tax';
+
+    /**
+     * View path of the resource.
+     *
+     * @var string
+     */
+    protected $viewPath = 'tax::admin.taxes';
+
+    /**
+     * Route prefix of the resource.
+     *
+     * @var string
+     */
+    protected $routePrefix = 'admin.taxes';
+
+    /**
+     * Form requests for the resource.
+     *
+     * @var array|string
+     */
+    protected $validation = SaveTaxRequest::class;
+}

Modules/Tax/Http/Controllers/CartTaxController.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Modules\Tax\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Modules\Cart\Facades\Cart;
+
+class CartTaxController
+{
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\Response
+     */
+    public function store(Request $request)
+    {
+        $this->mergeShippingAddress($request);
+
+        Cart::addTaxes($request);
+
+        return Cart::instance();
+    }
+
+    private function mergeShippingAddress($request)
+    {
+        $request->merge([
+            'shipping' => $request->ship_to_a_different_address ? $request->shipping : $request->billing,
+        ]);
+    }
+}