Quickbooks Online dreadfully slow

Hi there, Matt. I appreciate the time and effort you put into resolving the behavior you're getting while adding your expenses and receiving payments. I want you to have a seamless flow while working with QuickBooks Online (QBO).

I can see that you've already taken several troubleshooting steps to address the slow performance of QuickBooks. Since using different browsers and computers, clearing cache and cookies, running incognito mode, and switching WIFI networks don't resolve the issue, I recommend contacting support again to request a thorough investigation into your account's performance.

To start:

1. Sign in to your QBO account.
2. Go to the Help menu.
3. Click on Contact Us from the Search tab.
4. Enter a short description of your concern.
5. Choose a way to connect with support.

For your convenience, connect with them during their business hours.

On the other hand, I'm adding this material for additional hints in improving QBO performance: Why is my QuickBooks Online slow?

Once QuickBooks runs smoothly, you can now proceed with your QBO tasks. You may run through the resources from this website for more reference: Watch step-by-step videos to learn your way around QuickBooks.

If you require further assistance while running QuickBooks, let me know by leaving a comment below. I'm more than happy to help you again. Stay safe!