Hi there, @katherinep.
Welcome and thank you for posting here in the Community. I'm here to help share information on how to handle duplicate and un-reconciled transactions from the previous years.
You can delete those duplicate transactions from the previous years showing up on your banking page. For the un-reconciled transactions, you can reconcile them manually.
As always, you may need to consult with a professional accountant before doing the steps/process provided above.
Let me know if you have any other reconciliation concerns by adding a comment below. I'm always here to help!
