I'll share the steps on how to connect your bank account, @i9599113071-gmai.
To verify, are you getting an error code or error message? If so, please reply in the comment section so we can fix the error.
Meanwhile, you'll want to log in to your bank account using a browser. Then, look for a missed prompts. Check for messages that need your confirmation (ex. terms and conditions). Acknowledge the prompt, then go back and refresh your account in QuickBooks Online.
Check out this guide for more details: What to do if you get a bank error or can't download transactions in QuickBooks Online.
On the other hand, you can manually upload the transactions from your bank into QuickBooks Online. Once done, you can now match and categorise them.
For other banking-related tasks, browse this link to go to the page. It has topics that'll help you along the way.
Let me know how you get on after trying the steps, as I want to make sure this is resolved for you. Just reply to this post and I'll get back to you. Take care and have a great day ahead.
