Good evening, @azim - Vancovuer BC.
I hope you're having a successful week so far. Thank you for providing an update on deleting your reconciliations.
Since you manually unreconciled your transactions, you can go to the Accounting tab, choose Reconcile, and start your reconciliation from January 2020.
However, if QuickBooks still recognized your transactions as reconciled, then you'll need to get in touch with your accountant. They'll be able to undo all the reconciles so you can truly have a fresh start with your books. The articles provided by my colleague @DarellA above will give you more information on the accountant features.
Feel free to reply below if you have any other questions or concerns. I'm always here to lend a helping hand.
