Navigate to My Services under the Services dropdown
Select the service you have the WHMCS license on, in this case, it’s my reseller hosting which comes with a free WHMCS license, however, if you have purchased one with another service other than reseller hosting you can select that other services and continue.
Click on addons on the left
Here you shall see the addon for your WHMCS licence, in the name of the addon your licence key is present
You have now found your WHMCS licence, if you need further help, please contact us.