My quickbooks online will suddenly not connect with Bank of America?

Thanks for your first post here in the Community, @captwst. I want to help you connect your Bank of America accounts with QuickBooks. 

To make sure I can provide a timely solution, may I know if you're getting a specific error code or message when connecting?  

Meanwhile, you can log in to your bank's website to check if there are any outages or on-going maintenance. 

You can also read about this topic: What to do if bank transactions won’t download and refer to Step 3: Fix specific banking errors. It includes lists of common banking errors and their fixes. 

I'm always around here to further assist should you need to add more details of your concern. Take care.