install-0.1.0.php

<?php

$installer = $this;

$installer->startSetup();

$this->addAttribute('customer_address', 'reid', [
    'type' => 'varchar',
    'backend' => '',
    'label' => 'REID',
    'input' => 'text',
    'source' => '',
    'visible' => true,
    'required' => false,
    'default' => '',
    'frontend' => '',
    'unique' => false,
]);

Mage::getSingleton('eav/config')
    ->getAttribute('customer_address', 'govt_id')
    ->setData('used_in_forms', array('customer_register_address','customer_address_edit','adminhtml_customer_address'))
    ->save();

$installer->endSetup();