I can see that it's a duplicate post, @JPNG08.

My colleague MaryJoyD already shared her answer to your concern about linking your bank account to QuickBooks Online (QBO). You can check out her response through this link: https://quickbooks.intuit.com/learn-support/en-sg/banking/re-can-t-connect-bank-feed-for-ocbc/01/112....

The QuickBooks Community team is always here to help if you have any other concerns or follow-up questions. Have a good day!