You’ve selected an annual billing cycle (which will save you 10% on yearly subscription fees).
You’d like to pay $20 USD/month to add this feature to your current plan.
May I ask what plan you are currently on? You can confirm this at any time by visiting Settings > Plan in your admin.
Definitely let me know if you run into any challenges making any of the account changes I shared above. Once your account meets one of these requirements, you can contact our support team via our Help Center here to activate third-party carrier-calculated shipping for your account.