You can receive a new contactless card in one of two ways:
Go to the Debit Card Reorder page on Schwab.com. Choose the "Upgrade to contactless" button, verify your address, and then click "Request card." Your card will be mailed to the address that you choose, and you should receive it in 3–5 business days.
You will receive an upgraded contactless card upon expiration of your current card. There is nothing you will need to do. Your new card will be shipped to you a month or so before the expiration of your current card.