How can I undo a reconciliation

Hey there, @dfleck.

Hope you're having a great Friday. The Undo option for a reconciled period is only available in QuickBooks Online Accountant. I'd recommend inviting your accountant to your company, and let them undo the reconciliation period at once.

1. Click the Gear icon in the upper-right corner, and select Manage Users.
2. Go to the Accounting firms tab, and click the Invite button.
3. Enter the accountant's information.
4. Click Save.
5. Let your accountant undo the entire reconciliation.
   
   

Otherwise, you'll need to undo the reconciled transactions one at a time. You can use this article for reference: How to Unreconcile a Transaction or Undo a Reconciliation. 

Feel free to let us know if you need more assistance with this.