Are you a QuickBooks user wanting to enquire about the process of reconciliation? How do I unreconciled a month in QuickBooks online is one of the general questions that QuickBooks users ask. You can reserve a month's transactions by using the Undo, a reconciliation feature of this software. It eliminates the need to manually edit transactions from the records and unreconcile a set of previously done transactions. The process of doing this also depends on which version of QuickBooks you are using. Undoing a reconciliation will also remove all the existing attachments.