I'll guide you how to download the Client Authority Form (CAF), antstraw.
You'll have to fill out this form for Intuit to connect your bank account with QuickBooks Online (QBO). Once we received the form, it will usually takes up to 10 business days.
To download the form:
You can also check this article to know more about connecting your bank account to QuickBooks via Direct feed.
I've also added a link that you can read and learn how to review bank transactions after you download them into QBO: Match and categorise bank transactions in QuickBooks Online
We'll be around if you have further questions. Have a good one.