Add Custom links under Account Information tab in Magento Admin

Core File path:
app\code\core\Mage\Adminhtml\Block\Customer\Edit\Tab\Account.php

Copy the core files to local path
app\code\local\Mage\Adminhtml\Block\Customer\Edit\Tab\Account.php

/////

$suffixElement = $form->getElement('suffix');

        if ($suffixElement) {

            $suffixOptions = $this->helper('customer')->getNameSuffixOptions($customerStoreId);

            if (!empty($suffixOptions)) {

                $fieldset->removeField($suffixElement->getId());

                $suffixField = $fieldset->addField($suffixElement->getId(),

                    'select',

                    $suffixElement->getData(),

                    $form->getElement('lastname')->getId()

                );

                $suffixField->setValues($suffixOptions);

                if ($customer->getId()) {

                    $suffixField->addElementValues($customer->getSuffix());

                }

            }

        }

      

//////

and replace with
//////////////////////////////

$suffixElement = $form->getElement('suffix');

        if ($suffixElement) {

            $suffixOptions = $this->helper('customer')->getNameSuffixOptions($customerStoreId);

            if (!empty($suffixOptions)) {

                $fieldset->removeField($suffixElement->getId());

                $suffixField = $fieldset->addField($suffixElement->getId(),

                    'select',

                    $suffixElement->getData(),

                    $form->getElement('lastname')->getId()

                );

                $suffixField->setValues($suffixOptions);

                if ($customer->getId()) {

                    $suffixField->addElementValues($customer->getSuffix());

                }

            }

        }

        ///new code start here

         $fieldset->addField('attribute_code', 'link', array(

            'name'      => 'link name',

             'label'=>'link label',

             'href' => $customer->getattribute_code()

            

            ));

                  ///new field end here