Generally a domain name cannot be renamed once it is registered. Please double check your spelling before making the request, since domain names are registered for a full year at a time. In the event of a typo, there is a short grace period where we may be able to exchange the domain for the correct spelling (if it is available).
In the event of a business name change, you will need to purchase an addition domain for $20 per year. For your old business domain name, you have the option to keep the old domain name and keep paying for it (if you want it to remain active in case it is on old paperwork, business cards, etc) or you can let it expire.