If you do not see the "Edit Design" button in your Account order, you can use the following link below to make edits to your existing order. Replace the
RN000000000 at the end of the URL with your Reservation Number. Your reservation number can be found in your account orders screen (link) :
https://tesla.com/teslaaccount/edit-design/RN000000000
If you do not see the Edit Design button, you will likely see a black screen with text:
If you would like to make a change it may affect your delivery date and may be subject to a fee.
If you ordered your Tesala before August 1 2021, you will need to wait for Tesla to approve those orders and free edits. This is apparently in the works right now. Read more here.