Hi there, Dan257.
Let me guide you through the process of successfully uploading your CSV file.
Please note that CSV files exported from Google Sheets always include a header row. To ensure a smooth upload, open the CSV in a text editor or Excel and delete the header row before proceeding.
To remove the header row in Excel, simply click on the row number for the title, then right-click and select Delete Row.
You can refer to this article for guidance on ensuring the data is in the correct format: Format CSV files in Excel to get bank transactions into QuickBooks.
If you need further assistance, feel free to leave a post below.