Need some help, sorry for the bother

I am so deeply sorry if I’m doing things wrong, it’s my first time doing this and I’m a bit lost since it’s not for something too big but the FAQ didn’t help and I don’t understand how the forums work.  
I’m trying to rebrand myself and would like to change my deviantart link + the name of my artist tag, how may I do this?

@Leeloo  
I can help you with this - you can PM me the details of what you would like changed if you would like.