Why won’t my NatWest bank connection work? It brings up the accounts and let’s me agree but then shows a page saying application failed?

I will share information on why you're unable to connect your bank account, Bakinmarvellous-.

It can be caused by the new banking regulation. The bank data can only be downloaded through Open Banking. Having said that, you'll have to upgrade your connection so you can sync the transactions.

Some banks are unable to support this feature. We advise them to import the bank transactions manually through an Excel CSV file until the new connection is available. 

Let me include the article on how to import them manually: Add older transactions to QuickBooks Self-Employed.

You can also check these articles to help you learn more about Open Banking:

• Understanding if you can upgrade your bank feeds to Open Banking
• Open Banking FAQ

If there's anything else that you need, don't hesitate to reach out to us again. You're always welcome to post in the Community.