Hello there, @jpc4.
We appreciate you reaching out here in the Community space, and we want to ensure we're providing the details you need to get through this and have your bank connected to your QuickBooks Online (QBO) company.
Before anything else, we'd like to know what bank accounts you're trying to connect to your QBO account. It's also possible that the bank account you're attempting to link to your company may be doing its system maintenance. That said, you'll want to check their official website to see if they're having updates.
Also, if you happen to encounter an error when connecting your bank account, you can check this article and scroll down to see specific bank error troubleshooting methods: What to do if you get a bank error or can't download transactions in QuickBooks Online.
In addition, we've got these articles to help you manage bank transactions, and learn how to reconcile an account, and ensure your data stays accurate inside the program:
@jpc4, it's been a pleasure to have you here today. Feel free to visit the Community space or comment below if you have additional QuickBooks-related concerns. We've got you covered. Take care, and have a nice day!