To import your KuCoin transactions:
Log in into your KuCoin account and navigate to profile icon -> API Management or click on this link: https://www.kucoin.com/account/api
Click the Create API button
Enter a Name (ZenLedger is fine) and passphrase of your choice (passphrase must be 7-32 characters with no spaces)
Enter your trading password, email or text message verification code and/or Google Authenticator verification code depending on the method you chose while setting up the account for 2-factor authentication.
Copy the Passphrase that you created plus the Key and Secret that KuCoin generates, and paste into ZenLedger
For security purposes, please disable the Trade and Withdrawal permissions for this API key.
Video walkthrough of the process: