Hello, @tom-hinefitness-.

I'm here to bring you in the right direction to be able to resolve this issue you've currently encountered while accessing QuickBooks Online.

I'd recommend contacting our support team again to look into the error further. We check our support hours to ensure that you reaching us anytime at your convenience.

Here’s how to get in touch with our representatives:

1. Log in to your QuickBooks Online account.
2. Click the  Help button at the top right corner.
3. Go to the Search tab, then select Contact Us.
4. Enter a brief discussion with your concern, then click Continue.
5. Choose a way to connect with us: Ask the community, Start a chat or Get a callback.

For more hints about handling your invoices in QBO, you can open this article: Record invoice payments in QuickBooks Online.

I'm also adding this article with managing a customer list: Manage your customer list. This is a useful feature to track individual customers who are also members of a group or a large corporation.

Get back to us if you still need clarification after calling our phone support experts. I'll be right here around the corner. Have a good one.

QB Support i have already done all of this and it makes no difference

We really want to know why you're experiencing slowness when using QuickBooks so we can fix the issue, chazza.

Computer random access memory (RAM) is one of the most important components in determining your system's performance. The speed and performance of your system directly correlate to the amount of RAM you've installed. If your system has little RAM, it can be slow and sluggish. You can reach out to an IT Guy to check if your PC needs more RAM. If so, make sure you are buying memory that is compatible with the other components in your system. Ensures to better choose the right RAM to install in your system based on your needs. 

Aside from that, QuickBooks Online is built and tested with the latest browsers and operating systems. To know more about this, check out this article for your guide: Why Is My QuickBooks Online Slow?

Furthermore, the requirements for your computer's operating system, your internet speed, and your web and mobile browser vary depending on your system. I've added this article for your reference: System Requirements For QuickBooks Online, Accountant, Payroll, And QuickBooks Self-Employed.

Let us know if you have any other questions or concerns about QuickBooks. We're always right here to help you. 

Chazza. Welcome to the world of Intuit’s terrible customer service. So many threads like this of endless repeating the same ‘solution’ when obviously they’re not reading the thread of understanding the issue. 

It’s a sad state of affairs when we’ve been pushed over from Desktop and having to endure this shower of rubbish.