Hi @BryanVP,

I'll handle this query for you about an online bank account you have in QuickBooks Online (QBO).

Any transactions you added, matched, or have already reconciled are there to stay in the bank's register. Even if you close your bank account and disconnect it from your QBO company, reconciled transactions aren't affected in any way. 

In case you bump into any issues with your online bank, refer to this article: What to do if you get a bank error or can't download transactions in QuickBooks Online. It's a step by step guide on what you can do to resolve online bank problems. 

Don't hesitate to post a reply if you need further assistance with your online bank. I'll be sure to get back to you.