Go to "Wallet":
- Click your profile photo in the top right corner > "Wallet"
- Click "Tutor studio" in the top right corner > sum you have at the moment, or "Wallet" on the left side

On the "Wallet" page, click "Withdraw money" and follow instructions: indicate your PayPal- or Payoneer-linked email and choose the amount you want to withdraw.
Withdrawal requests are processed every Thursday. So make sure to request a withdrawal before that day.