first upload all files

Modules/Tax/Providers/TaxServiceProvider.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Modules\Tax\Providers;
+
+use Modules\Tax\Admin\TaxTabs;
+use Modules\Support\Traits\AddsAsset;
+use Illuminate\Support\ServiceProvider;
+use Modules\Admin\Ui\Facades\TabManager;
+
+class TaxServiceProvider extends ServiceProvider
+{
+    use AddsAsset;
+
+    /**
+     * Bootstrap the application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        TabManager::register('tax_classes', TaxTabs::class);
+
+        $this->addAdminAssets('admin.taxes.(create|edit)', ['admin.tax.css', 'admin.tax.js']);
+    }
+}