You can update both your shipping and billing addresses through your Huel account.
To update your shipping address (for subscriptions):
1. Log into your Huel account
2. Click on My Subscriptions
3. Select Manage Subscription
4. Below the price of your upcoming order, find the Shipping section
5. Click the Edit button next to it
6. Make your changes and click Save
To update your billing address:
1. Log into your Huel account
2. Go to Payment Methods
3. Click Edit on the card or payment option
4. Enter your new billing address and click Save