It is very easy to forward mails. All you need to do is log into cPanel, and follow the below steps:
Click on Forwarders under the Mail section.
Create a forwarder
You can access cPanel through client zone. You will not be required to enter username and password if you access cPanel through client zone.
Select the domain you want to create the forwarder for.
Click on cPanel.
You have the choice to forward mails from one domain to another or one email address to another.