You certainly can. Once your domain name registration has been completed, you become the administrative contact (owner in a way) of the domain. You are entitled to modify your domain name record. We can surely assist you if you are having a difficult time, just let us know.

When your domain name registration is completed, you will receive an email message that includes your registry key. Be sure to save this key and keep it in a safe and reliable place. When you need to change information in your NIC record, have your registry key handy and go to http://www.inww.com/maintenance/gtld/ Enter your domain name and your registry key in the specified fields and choose Edit Contact Details.