Hello,

Thank you for your post.

Please see the following steps of how to update your card:

Complete the following steps to update the credit or debit card information in your selling account:

1. Go to Settings and click Account info.
2. From the Payment information section, select Charge methods.
3. Click Replace charge method for the credit or debit card you want to replace, and select the store where you would like to assign a new charge method.
4. Select an option to either add a new credit or debit card or select a card that is already available in Seller Central. Enter the requested information exactly as it appears on your credit or debit card statement.
5. In some instances, you may be redirected to your financial institution to verify your card with a security challenge, before being redirected back to Amazon.

You can find more information on this help page: Seller credit or debit card FAQ.

Regards,

Jessica