Why will Quickbooks not reconnect to my Bank Account? I keep getting Authentication Failed Input every time for the past 24 hours! Help!

Hello there, @adpowis-hotmail-.

I'd like to ensure that you'll be able to reconnect your bank account in QuickBooks Self-Employed. 

To start with, I want to ask what specific financial institution are you working with? This can help me check if there are any issues related to this matter.

On the other hand, if you're reconnecting your account using the app, I recommend doing this on a browser instead. It is a good start to verify if the problem has something to do with the application.

To do that: 

1. Open your account on a browser. 
2. Go to the Settings ⚙ icon and select Bank accounts.
3. Select Connect another account.
4. In the search box, enter the name of the bank and account type, i.e Lloyds Bank Business, Lloyds Bank Personal or Lloyds Bank Commercial.
5. Follow the onscreen instructions to connect your account. QuickBooks Self-Employed will automatically download your recent bank transactions.

If it works fine, you may uninstall and reinstall the app. It refreshes your data and fixes app-related issues. In case you need more insights, I recommend visiting the How to download the QuickBooks Online mobile app article. You can bookmark the website for future reference about the download and installation process.

If doing this doesn't make a difference, I suggest reaching out to your financial institution to identify if they have an ongoing issue that leads to this problem. 

For more details about reconnecting bank account in QBSE, please see this link: Reconnect your bank account in QuickBooks Self-Employed.

I'll be right here to assist you further if you have any other concerns. Just leave a reply below. Take care!