CryptoTrader.Tax only needs "Read" or "View" access to import your trade history. This permission protects your accounts. Learn more about API access in this article here.
Note: Due to a limitation in KuCoin's API, transactions before 2/18/2019 are unable to be imported.
If you traded on KuCoin before then you will need to make sure you get trade history files that cover all years. Follow this guide to export your KuCoin files directly from the site or send a request for your complete trade history to the KuCoin support team.
Login to your KuCoin account.
Navigate to the API management page and click the Create API button.
Use "CTT" as the API Name and pick a phrase you will remember for the API Passphrase, you will need this later.
Click on Change and change the permission level to only General. Take note of the Key and Secret for the next step.
Back in CryptoTrader.Tax, enter your Key, Secret, and Passphrase from earlier steps into their matching fields on the KuCoin tab.
Click on the Connect button to start the importer.