diff --git a/app/Filament/Resources/InvoiceValidationResource.php b/app/Filament/Resources/InvoiceValidationResource.php
index c5e8b49..1a6d833 100644
--- a/app/Filament/Resources/InvoiceValidationResource.php
+++ b/app/Filament/Resources/InvoiceValidationResource.php
@@ -212,6 +212,14 @@ class InvoiceValidationResource extends Resource
                         Forms\Components\TextInput::make('id')
                             ->hidden()
                             ->readOnly(true),
+                        // Forms\Components\Hidden::make('created_by')
+                        //     ->label('Created By')
+                        //     ->default(Filament::auth()->user()?->name)
+                        //     ->reactive(),
+                        // Forms\Components\Hidden::make('updated_by')
+                        //     ->label('Updated By')
+                        //     ->default(Filament::auth()->user()?->name)
+                        //     ->reactive(),
                     ])
                     ->columns(5),
             ]);
@@ -267,9 +275,11 @@ class InvoiceValidationResource extends Resource
                 Tables\Columns\TextColumn::make('scanned_status')
                     ->label('Scanned Status')
                     ->alignCenter(),
-                // Tables\Columns\TextColumn::make('stickerMaster.panel_box_code')
-                //     ->label('Panel Box Code')
-                //     ->alignCenter(),
+                Tables\Columns\TextColumn::make('panel_box_code')// stickerMaster.panel_box_code
+                    ->label('Panel Box Code')
+                    ->alignCenter()
+                    ->sortable(), // ->searchable()
+                // ->toggleable(isToggledHiddenByDefault: true),
                 Tables\Columns\TextColumn::make('panel_box_supplier')
                     ->label('Panel Box Supplier')
                     ->alignCenter(),
@@ -294,11 +304,20 @@ class InvoiceValidationResource extends Resource
                     ->label('Plant')
                     ->alignCenter()
                     ->sortable(),
+                Tables\Columns\TextColumn::make('created_by')
+                    ->label('Created By')
+                    ->alignCenter()
+                    ->sortable(),
                 Tables\Columns\TextColumn::make('created_at')
                     ->label('Created At')
                     ->dateTime()
                     ->alignCenter()
                     ->sortable(),
+                Tables\Columns\TextColumn::make('updated_by')
+                    ->label('Updated By')
+                    ->alignCenter()
+                    ->sortable()
+                    ->toggleable(isToggledHiddenByDefault: true),
                 Tables\Columns\TextColumn::make('updated_at')
                     ->label('Updated At')
                     ->dateTime()
@@ -358,11 +377,15 @@ class InvoiceValidationResource extends Resource
 
                         FileUpload::make('invoice_serial_number')
                             ->label('Invoice Serial Number')
-                            // ->required()
-                            ->preserveFilenames() // <- this keeps the original filename
-                            ->storeFiles(false) // prevent auto-storing, we will store manually
-                            ->reactive()
                             ->required()
+                            ->acceptedFileTypes([
+                                'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+                                'application/vnd.ms-excel', // Legacy .xls fallback if needed
+                            ])
+                            ->rules(['mimes:xlsx']) // Laravel validation: extension check
+                            ->preserveFilenames() // <- this keeps the original filename
+                            ->reactive()
+                            ->storeFiles(false) // prevent auto-storing, we will store manually
                             ->disk('local') // 'local' refers to the local storage disk defined in config/filesystems.php, typically pointing to storage/app.
                             ->visible(fn (Get $get) => ! empty($get('plant_id')))
                             ->directory(function (callable $get) {
@@ -370,7 +393,9 @@ class InvoiceValidationResource extends Resource
                                 $plantCode = $plant?->code ?? null;
 
                                 return "uploads/temp/{$plantCode}";
-                            }),
+                            })
+                            ->uploadingMessage('Uploading...')
+                            ->helperText('Only .xlsx files are allowed (Excel files).'),
                     ])
                     ->action(function (array $data) {
                         $uploadedFile = $data['invoice_serial_number'];
@@ -385,15 +410,22 @@ class InvoiceValidationResource extends Resource
                         // Get original filename
                         $originalName = $uploadedFile->getClientOriginalName(); // e.g. 3RA0018732.xlsx
 
+                        $extension = strtolower(pathinfo($originalName, PATHINFO_EXTENSION));
+                        if ($extension !== 'xlsx') {
+                            throw new \Exception('Only .xlsx files allowed.');
+                        }
+
                         $originalNameOnly = pathinfo($originalName, PATHINFO_FILENAME);
 
+                        $originalName = "{$originalNameOnly}.xlsx";
+
                         // Store manually using storeAs to keep original name
                         $path = $uploadedFile->storeAs("uploads/temp/{$plantCode}", $originalName, 'local'); // returns relative path
                         // uploads/temp/{$plantCode}/3RA0018735.xlsx
 
-                        if ($originalNameOnly && strlen($originalNameOnly) < 8) {
+                        if (strlen($originalNameOnly) < 8 || ! ctype_alnum($originalNameOnly)) {
                             Notification::make()
-                                ->title("Invoice number : '$originalNameOnly' should be greater than or equal to 8 characters!")
+                                ->title("Serial invoice number : '$originalNameOnly' should contain minimum 8 digit alpha numeric values!")
                                 ->danger()
                                 ->send();
 
@@ -692,8 +724,8 @@ class InvoiceValidationResource extends Resource
                         FileUpload::make('invoice_material')
                             ->label('Invoice Material')
                             ->required()
-                            ->preserveFilenames()
-                            ->reactive() // <- this keeps the original filename
+                            ->preserveFilenames() // <- this keeps the original filename
+                            ->reactive()
                             ->storeFiles(false) // prevent auto-storing
                             ->disk('local')
                             ->visible(fn (Get $get) => ! empty($get('plant_id')))
@@ -702,7 +734,8 @@ class InvoiceValidationResource extends Resource
                                 $plantCode = $plant?->code ?? null;
 
                                 return "uploads/temp/{$plantCode}";
-                            }),
+                            })
+                            ->helperText('Only .xlsx files are allowed (Excel files).'),
                     ])
                     ->action(function (array $data) {
                         $uploadedFile = $data['invoice_material'];
@@ -717,13 +750,20 @@ class InvoiceValidationResource extends Resource
                         // Get original filename
                         $originalName = $uploadedFile->getClientOriginalName();
 
+                        $extension = strtolower(pathinfo($originalName, PATHINFO_EXTENSION));
+                        if ($extension !== 'xlsx') {
+                            throw new \Exception('Only .xlsx files allowed.');
+                        }
+
                         $originalNameOnly = pathinfo($originalName, PATHINFO_FILENAME);
 
+                        $originalName = "{$originalNameOnly}.xlsx";
+
                         $path = $uploadedFile->storeAs("uploads/temp/{$plantCode}", $originalName, 'local');
 
-                        if ($originalNameOnly && strlen($originalNameOnly) < 8) {
+                        if (strlen($originalNameOnly) < 8 || ! ctype_alnum($originalNameOnly)) {
                             Notification::make()
-                                ->title("Invoice number : '$originalNameOnly' should be greater than or equal to 8 characters!")
+                                ->title("Material invoice number : '$originalNameOnly' should contain minimum 8 digit alpha numeric values!")
                                 ->danger()
                                 ->send();