This information is presented to you after you select your preferred withdrawal method. Your available to withdraw represents the amount of your balance that isn't tied to an unplayed deposit or an active bonus.
To view your active bonuses go here on the web platform: https://app.ownersbox.com/wfs/bonuses
All deposits have a default one-time playthrough. However, if you would like a refund of your deposit, you can submit a withdrawal request for an amount higher than your available to withdraw. You will see red warning text letting you know it exceeds your ATW, but it will let you hit "Submit". We will then review it and reach out.