Editing a transaction that has already been reconciled
Some information can be changed on your reconciled transactions. When you attempt to edit a transaction that you've already reconciled, a warning message will appear to alert you that your changes may affect your next reconciliation. If you decide to change the transaction anyway, you will be able to edit everything except the total amount without throwing your reconciliation out of balance. However, if the allocation account for the transaction is a bank account that has already been reconciled, you cannot edit the allocation account without affecting your next reconciliation. (To reconcile an account)