1) Log into WHM
2) Scroll down and click on the Terminate Accounts button located under the Account Functions section.
3) Select one or multiple accounts by clicking on the checkbox located in front of the username.
You can use the search function to find the account by using either the domain name or the username of the account.
If you’d like to keep the account’s DNS Zone, check the box for this option.
4) Click on Terminate button to proceed with the termination.
5) A warning message will appear next, review everything and click YES if you want to proceed.
Please keep in mind that it can take some time for everything to be removed from your server depending on the size of the account.