To redeem a Steam Wallet Code on your account, please login to your account and visit Redeem a Steam Gift Card or Wallet Code page: https://store.steampowered.com/account/redeemwalletcode. Enter your unique wallet code into the “Steam Wallet Code” field and click “Continue” to add the value to your account’s Steam Wallet balance.
Once a Steam Wallet Code has been redeemed on an account, the wallet funds are then tied to that account; they cannot be moved or withdrawn to a bank account.
Please visit https://help.steampowered.com/en/faqs/view/78E3-7431-1E88-AD59 for more details.
