Welcome to the Community forum. I appreciate you posting your concern here about connecting your bank account to QuickBooks. You've reached the right place for this. I'd gladly share my insight to help you achieve your goal ASAP!
Before anything else, I'd like to ask the name of your bank institution. Also, if you're getting an error, I'd appreciate it if you could share more details about it. This way, we can establish alignment and have the best solution to your concern.
On the other hand, here are some reasons why you can't connect your bank in QuickBooks Online (QBO):
You can check out this article for more details: Find your bank account when you connect to online banking.
I'm adding this article you can use in the future: Connect bank and credit card accounts to QuickBooks Online.
This information will certainly help you establish a connection between your bank account and QuickBooks. If you have further questions about your bank connection, post them here in the forum. I'll be around to answer all of them in any way possible. Have a good one!
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