You can export the private key for your Boxes wallet from the account menu, under Connected wallets.

Private key: keep this secret, never share it. Anyone who has it can access your funds directly.

Exporting your private key permanently unlinks your wallet from Bitso. Once you do this, Bitso can no longer show, manage, or recover that wallet. You take full control and full responsibility for your keys from that point on.

If you had funds in Boxes at the time, that balance is no longer visible in Bitso. You'll need to manage it directly through a compatible third-party wallet interface.

If you want to use Boxes again afterward, Bitso creates a new wallet for you.