Change it
- Open Profile for the artist. The handle sits beside the name.
- Type the new handle and save.
The same rules apply as when you claimed it: What a handle can be.
The old handle keeps working
Every link you ever sent keeps opening the artist. The old handle redirects to the new one and stays reserved for this artist, so nobody else can claim it.
On a verified artist
The handle is the address the verification was granted under, so on a verified artist the name and the handle are both locked and a change goes through a request TAP reviews: Change the name or handle of a verified artist.