If you're looking to update your billing method for your Persist subscription, log into the My Account page and find the Subscriptions section on the left-hand side. Once you are there, you can update your billing information.

If you are looking to save your billing information for a faster checkout of ebook or apparel purchases, go to My Account and find the "Payment Methods" tab to log your preferred payment method.
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If your subscription is via ATOM please reach out to support@trainatom.com, they will be able to assist you with any subscription changes.
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