Then click the Upgrade/Downgrade an Account linkUpgrading or downgrading an account uses account packages. In other words, we’re simply going to assign a different package to one of the accounts in WHM
Select an account from the list using its main domain or username, or search for an account below.
Click Modify.
This account’s current package is indicated up here, and is selected by default in the New Package menu below.
Select a new package from the list.Click Upgrade/ Downgrade.