First, you'll need to log in to your CPanel Account. If you didn't already do that, use those instructions to login to your CPanel account.

Once inside CPanel, locate the EMAIL section and click on Forwarders
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From there click on "Add Forwarder"
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Fill in the details in the next screen
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The "Address to forward" is the alias / mail group / forwarder you're trying to create (e.g: [email protected])

In the Destination part, put the email address of the person who should receive that e-mail forwarded (e.g put here [email protected] to receive mails sent to [email protected])

Repeat this step for all people who should get the copy (e.g: [email protected] could be sent to you, your assistant, etc...)