One need to perform below mentioned steps to move one domain from one account to another account:
1) Open HELM Toolbox.
2) Click on Move Domain Tool from side menu bar.
3) Enter the username from which one need to move the domain and click on Get Domains to fetch the domains list.
4) Select the domain name from the list.
5) Enter the account number in which one need to move the domain.
6) Select the require package from the package list.
7) Click on move domain to complete the process.