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.
Click on the connect button to go to your Coinbase account.
After clicking the button, it will take you to the Coinbase website where all you can authorize CryptoTrader.Tax to import your trades. Click on Authorize to give our website to import your trade history.
After clicking authorize, it will take you back to CryptoTrader.Tax. To start the trade importer, click on the Import Your Trades button.
You will see this screen appear once the full import has finished.