Thanks for getting back to us, @nlangton.
Since you couldn't find your bank using the URL, this means that QuickBooks Self-Employed (QBSE) doesn't support your bank. As an alternative, you can consider exporting and importing your bank transactions using a CSV file. Let me guide you how.
First off, you'll need to export data from your bank. Here's how:
Once done, you can now import your bank transactions into QBSE.
Here's an article you can read for more details: Import Transactions From Earlier Date Ranges.
You can also submit a request to add your bank in the future. Here's how:
You can check out this article for your reference: Problems Finding a Bank.
Please know that QuickBooks will add support for new banks based on the number of customer request and approvals from the bank.
You might also want to read this article to know more about categorizing transactions: Categorising & Editing Transactions in the Mobile App.
If you have any other questions, feel free to comment below. We're always here to help you.