How do I change my last name into a Domain?

[#1]

Hi everyone. I'd like to change my last name into a domaine but I always get an error notification. Does anybody know how to fix that problem? Thanks in advance! 

[#2]

Hi @Raphaela1

Do you mind sharing a screenshot of where you are looking to update this information? If you can clarify your end goal and roadblock, that would be great!

The more information, screenshots and details you can provide, the better the Community can assist.

Thank you,
Jenny