Sometimes you need to move one account from one reseller account to another reseller account in order to move the ownership of a hosting account in our WHM cpanel, to do :

1. Login to your WHM Panel (as root)
2. Go to Reseller Center (Under Reseller Category)
3. Choose menu “Change Ownership of an account” under the “Change Account Ownership/Email Resellers” category
4. Choose the domain / user you want to move in account selection,
5. Choose the reseller account then click the “OK” button

Now the account will be under the WHM reseller account :)