Open the Gemini API page by clicking your name at the top right menu and selecting API Settings.
Click Create a New API Key.
In the API key settings, disable Trading and enable Auditor.
Copy your API key and secret to TokenTax.
Click Confirm once you have copied over the API information.
Click the Trade History tab.
Click Download History (xlsx) and set the date range to encompass your entire trading history. Then click Download .XLSX.
Upload your XLSX file to TokenTax.