It always pays to shop around.
Login into your McAfee Account
Go to Products & subscriptions tab
Check if you an option to add a license
Unfortunatley, when you buy your McAfee products pre-loaded directly from Dell, there is no option to add a license. I tried the steps you listed (log in, go to products and subscriptions) but to no avail. There was no option to add a license. I called McAfee directly and spoke to both their Customer Service and Technical Support departments. They confirmed for me that when you buy McAfee pre-loaded directly from Dell you can not add a license. At least this is true for Dell computers purchased within the last year and a half - I can speak for earlier ones.
Thanks for your advice though - I appreciate it.
I just wanted you to give a try, but it didn’t worked out. Sorry for that and thanks for trying