CryptoTrader.Tax only needs "Read" or "View" access to your accounts to import your trade history. This permission protects your accounts. Learn more about API access in this article here.
Click the menu button at the top right of the Coinbase Pro dashboard and select API from the dropdown.
Under Profile Information in the API Settings tab, click the + NEW API KEY button at the top right corner.
Select your profile and check the "View" box in permissions.
Create a passphrase, and then enter in your Two Factor Authentication code.
Click the Create API Key button at the bottom to make a unique key. The new API key and secret will be displayed on the API Settings page.
*Note that the API Secret will only be shown once, so remember to record your Secret in a secure location.
Enter your API Key, Secret, and Passphrase into CryptoTrader.Tax and click Import.