If you have a Free or Portfolio Plan with your Creative Cloud subscription, you may upgrade to higher plan. To do so, visit your account page and select “change your plan.” Then, select which plan you’d like. When you upgrade, you will be billed separately for your upgraded Typekit plan. Your Creative Cloud billing will remain unchanged.
Once upgraded, you can downgrade at any time. Note that paid Creative Cloud users cannot downgrade to the Personal or Free Plans, as a paid Creative Cloud account includes a Typekit Portfolio Plan.