diff --git a/app/Filament/Resources/IncomingLetterResource.php b/app/Filament/Resources/IncomingLetterResource.php
index 2d5b259..7bc8655 100644
--- a/app/Filament/Resources/IncomingLetterResource.php
+++ b/app/Filament/Resources/IncomingLetterResource.php
@@ -23,7 +23,9 @@ class IncomingLetterResource extends Resource
         return $form
             ->schema([
                 TextInput::make('number')
-                    ->required(),
+                    ->integer()
+                    ->required()
+                    ->default(fn () => getLatestNumber() + 1),
 
                 TextInput::make('name')
                     ->required(),
diff --git a/app/Filament/Resources/IncomingLetterResource/Pages/CreateIncomingLetter.php b/app/Filament/Resources/IncomingLetterResource/Pages/CreateIncomingLetter.php
index 5ffc7f0..63bcb62 100644
--- a/app/Filament/Resources/IncomingLetterResource/Pages/CreateIncomingLetter.php
+++ b/app/Filament/Resources/IncomingLetterResource/Pages/CreateIncomingLetter.php
@@ -11,6 +11,6 @@ class CreateIncomingLetter extends CreateRecord
 
     protected function getRedirectUrl(): string
     {
-        return static::getResource()::getUrl('index');
+        return $this->getResource()::getUrl('index');
     }
 }
diff --git a/app/Helpers/helpers.php b/app/Helpers/helpers.php
index 9f19bbc..e61a378 100644
--- a/app/Helpers/helpers.php
+++ b/app/Helpers/helpers.php
@@ -3,7 +3,9 @@
 use App\Modules\EmptyModule;
 use App\Modules\ModuleContract;
 use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\File;
+use Illuminate\Support\Facades\Log;
 use Illuminate\Support\Str;
 
 /**
@@ -94,3 +96,29 @@ function temp_cache(string $key = ''): mixed
         ? $tempCache->get($key)
         : cache()->driver('array');
 }
+
+/**
+ * Log
+ */
+function logDB(): void
+{
+    if (! app()->isLocal()) {
+        return;
+    }
+
+    DB::listen(function ($query) {
+        Log::info($query->sql, $query->bindings, $query->time);
+    });
+}
+
+/**
+ * Get latest number
+ *
+ * @param  string $tableName
+ */
+function getLatestNumber(string $tableName = 'incoming_letters', string $column = 'number'): int
+{
+    $data = DB::table($tableName)->select(DB::raw("MAX(CAST(REGEXP_REPLACE({$column}, '[^0-9]', '') AS UNSIGNED)) AS max_number"))->first();
+
+    return intval($data->max_number) ?? 0;
+}
diff --git a/app/Modules/IncomingLetter/Database/Migrations/2024_10_22_152424_create_incoming_letters_table.php b/app/Modules/IncomingLetter/Database/Migrations/2024_10_22_152424_create_incoming_letters_table.php
index 356e1cb..6f3e163 100644
--- a/app/Modules/IncomingLetter/Database/Migrations/2024_10_22_152424_create_incoming_letters_table.php
+++ b/app/Modules/IncomingLetter/Database/Migrations/2024_10_22_152424_create_incoming_letters_table.php
@@ -16,6 +16,7 @@ return new class extends Migration
             $table->string('number')->nullable();
             $table->string('name')->nullable();
             $table->string('main_file')->nullable();
+            $table->softDeletes();
             $table->timestamps();
         });
     }
diff --git a/app/Modules/IncomingLetter/IncomingLetterModule.php b/app/Modules/IncomingLetter/IncomingLetterModule.php
index 9798f7e..43ad553 100644
--- a/app/Modules/IncomingLetter/IncomingLetterModule.php
+++ b/app/Modules/IncomingLetter/IncomingLetterModule.php
@@ -4,10 +4,12 @@ namespace App\Modules\IncomingLetter;
 
 use App\Modules\Makeable;
 use App\Modules\ModuleContract;
+use Illuminate\Database\Eloquent\SoftDeletes;
 
 class IncomingLetterModule implements ModuleContract
 {
     use Makeable;
+    use SoftDeletes;
 
     /**
      * Module is enabled
diff --git a/app/Modules/OutgoingLetter/Database/Migrations/2024_10_22_152500_create_outgoing_letters_table.php b/app/Modules/OutgoingLetter/Database/Migrations/2024_10_22_152500_create_outgoing_letters_table.php
index 0c34632..cc69719 100644
--- a/app/Modules/OutgoingLetter/Database/Migrations/2024_10_22_152500_create_outgoing_letters_table.php
+++ b/app/Modules/OutgoingLetter/Database/Migrations/2024_10_22_152500_create_outgoing_letters_table.php
@@ -16,6 +16,7 @@ return new class extends Migration
             $table->string('number')->nullable();
             $table->string('name')->nullable();
             $table->string('main_file')->nullable();
+            $table->softDeletes();
             $table->timestamps();
         });
     }
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 0fe693a..accf424 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -24,6 +24,8 @@ class AppServiceProvider extends ServiceProvider
         Model::shouldBeStrict(! app()->isProduction());
 
         $this->registerModules();
+
+        // logDB();
     }
 
     /**