To modify your personal data, delivery or billing address, you must be registered. You will thus be able to access your data and modify them. To access, you just have click on your name and select the option: Access my data.
After entering, you will only have to select the Edit and Save option for the data you want to modify. You may also view your purchases and saved lists, manage returns, and request an invoice if you need it.
If you have placed an order, its delivery and billing address may not be modified from the platform. You can see more details in ABOUT THE ORDER. Point 1. Can I modify an order?