Hi All !!! As per my last post we have updated customer group prices in these I am sharing code to add/update product attributes whether its a custom or default attribute. Have a look at the code: <?php //Upload File if (isset($_POST['submit'])) { if (is_uploaded_file($_FILES['filename']['tmp_name'])) { echo "<h1>" . "File ". $_FILES['filename']['name'] ." uploaded successfully." . "</h1>"; } //Import uploaded file to Database $handle = fopen($_FILES['filename']['tmp_name'], "r"); $i=0; while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) { if($i>0) { $si = Mage::getModel('catalog/product')->loadByAttribute('sku',$data[0]); ...