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Hello there, @jeff_tortorelli.
In reconnecting your account, it has the same steps on how you connected it for the first time:
Let me guide you how:
1. Go to Banking, select Connect account or Add account.
2. Type in your bank name or URL.
3. Click Continue and enter your online banking login credentials.
4. Choose the account and select the type you'd like to connect.
5. Click Connect.
Let me include this article on how to download bank transactions for your future reference: Manually download online bank transactions in QuickBooks Online.
I'm always here to answer if you have additional questions, feel free to post.