Login To Your Gemini Account
Navigate to the History Page
Click the "Download History" Link
DO NOT open the file in Excel and "save as" a new file.
It's important to upload the raw file that Gemini exports straight from your "Downloads" folder. This avoids rounding errors and corrupting the file. If you need to edit your XLSX, please use Google Sheets.
Upload your trade history file into the Gemini tab on Step 2 (Import Trades) and click the Import Trades button.