Follow these steps to redeem your Steam Wallet Code:
- Sign in to your Steam account in your browser
- Go to the Redeem a Steam Wallet Code page
- Enter the Steam Wallet Code copied from the "Withdrawals" section in your Idle-Empire User Panel
- The funds will be added to your Steam account and be ready for use to buy skins, games, and anything else from Steam!
Note: You can find the official instructions here.