You can perform the troubleshooting steps to resolve the errors in your CSV file, @totalisetrading.
First, could you please tell me what bank account and which part of the process you've encountered the error? This will help me better understand the issue and provide you with appropriate solutions.
In the meantime, let's clear your cache and Intuit-specific cookies to remove the excessive webpage data that's causing the issue.
You can refer to this resource to learn more about the CSV file format: Prepare Your CSV File for Bank Upload to QuickBooks.
After successfully uploading your entries, you can refer to this article to guide you in categorizing them: Categorise online bank transactions.
We're always here to help if you have further concerns about CSV.