If you purchased the subscription with a credit card, you can change your payment information in the Billing tab of your profile summary by clicking the Change payment info button ⬇️

If you bought the plan via PayPal, you can follow this tutorial on updating your payment information in PayPal.

🎈 If you see a red banner telling you that the last payment failed, please don't rush to buy a new subscription. Instead, check out this FAQ article to learn the best way to resolve the issue.