Natwest connection expired try to renew and show this messages Authentication failed input

I've got you covered, @Duangja.

In open banking, the connection will only last for 90 days. When that ends, you'll receive an invite to re-authorise the connection in QuickBooks. For more details, please head to Open Banking FAQ. 

Let's connect your bank to QuickBooks Self-Employed (QBSE) using a private browser. Private mode prevents storing cache and cookies that might cause problems when running websites. 

Here are the shortcut keys you can use:

• Google Chrome: press Ctrl + Shift + N 
• Mozilla Firefox and Microsoft Edge: press Ctrl + Shift + P
• Safari: press Command + Shift + N

Once signed in, reconnect Natwest to QBSE:

1. Navigate to the Settings icon and select Bank accounts. 
2. Click Connect another account.
3. From the search box, enter the name of the bank and account type.
4. Follow the on-screen instructions to connect your account. QuickBooks Self-Employed will automatically download your recent bank transactions.

For more details, see this article: Reconnect your bank account in QuickBooks Self-Employed.

If this works, go back to your regular browser and clear the cache. This will remove the stored cache or cookies to refresh your browser. If the same thing happens, use another supported browser. It could be that the one you're currently using has a temporary issue with QuickBooks. 

You can also visit our Categorise transactions page to help you in managing your QuickBooks Self Employed account. This page includes steps on how to record your self-employed income and expenses, and prepare your Schedule C.  

Feel free to get back here if you have further concerns about connecting Natwest to QuickBooks. I'm always here to help. Have a great day.