Once a domain name has been purchased and registered, it cannot be edited or modified.
Why?
When you register a domain, you are reserving a specific sequence of letters and characters. Because this registration is permanent for the duration of your term, the system cannot "swap" one name for another.
How to Change Your Domain
If you have already made a purchase but would like a different name, the only way to change it is to register a new domain.
Important: Please double-check your spelling carefully before finalizing your purchase, as domain registrations are non-refundable.