I've got you covered, Ferg1. I'll add details regarding the QuickBooks checking account with QuickBooks Online(QBO).
QuickBooks checking is already synced with your online account and has no separate login credentials. That's why linking it to QBO is unavailable. Is there a specific transaction you wanted to do with your checking account?
If you want to transfer a fund from your account to an external bank, check out this article: Transfer funds instantly with QuickBooks Checking.
To help you get answers to frequently asked questions about QuickBooks Checking, refer to this resource: QuickBooks Checking FAQ.
Let us know in the comments if you have further questions about managing your QuickBooks checking account. We're always here to help you out. Stay safe!
