If you are processing for the first time you need to identify a bank account primarily. Check out our How can I identify my bank account information titled article for more detailed info. Check out our Which bank accounts can I transfer Turkish lira? titled article for more detailed info.
After you log in to your Koinim account, click on "- Withdraw" option under "ACCOUNT TRANSACTIONS" headline. Select to “Whitdraw Turkish Lira” on the opening page. Considering your transaction limit and Turkish lira balance, you can withdraw Turkish lira by entering "Amount" box. Withdrawing Turkish currency has 3₺ transaction fee which is withdrawn from your Koinim balance on every withdrawal. To withdraw all Turkish lira balance in your account, you need to subtract fee from your balance and enter it.
Check out our article entitled, How much are the lowest and highest withdrawal and deposit transaction limits? to learn Turkish lira withdrawal limits.