1.Login into your account and on the domain name in "My Products"
2.Click on the domain name you would like to edit
3.Click Domain Services on the left
4.Enter your desired name servers and save
Note: Nameserver Update Failed or Rejected
If you see "Nameserver update rejected" or "failed" after update your nameservers , the registry may have rejected the nameservers because your nameservers do not meet registry's technical validation requirements. This is usually related to DNS configuration issues, such as the nameservers not being properly configured, not responding correctly, or not set up as authoritative.
Please contact your DNS/hosting provider to ensure the nameservers are correctly set up and publicly resolvable.
Once they are valid, you may try updating them again.