1. Check your API Key Permissions
Go to Account > Permissions
Your API key needs to have the Wallets - Read permission turned on, as shown in the image below.
If your key doesn't have this requirement on, you can go to bitfinex.com/api to create a new API key.
2. Navigate to the Deposit
Go to Wallet > Deposit (scroll down)
Select the Payment Type and Wallet where you want to deposit. (Read more about Bitfinex wallets), and Currency then hit Next. You will then be redirected to your address.
Use the QR code or tap to copy the displayed address.