Hello, my bank account has become disconnected with Quickbooks and whenever I attempt to reconnect it and go through the steps, I end up with an error message: “authentication failed input”. Can anyone please offer some help? Many thanks

Let's sort out this error so you'll be able to reconnect to your bank account, usersharna-marie.

There are times that your browser is full of frequently-accessed page resources that cause QuickBooks Online (QBO), to act unusual behavior. You can log in to your QBO account using a private browser to rule out any cache related issues. 

Here are the keyboard shortcuts:

Google Chrome: Ctrl + Shift + N
Mozilla Firefox: Ctrl + Shift + P
Safari: Command + Option + P

If it works, clear your browser's cache to speed up the loading process of the QBO website and for the system to start fresh. You can also use a different browser.

However, if you're using an app. You can perform the steps below.

• Complete an NVRAM reset (contact Apple support for the steps or search for the process)
• Reset the router
• Use a different network
• Use a non-Apple computer

For reference, please check out these help articles for more troubleshooting steps.

Please let me know if the steps work. If there's anything else that you want us to help with, make sure to let us. We're here ready to assist you as always.