You actually have 2 options You can edit the Journal Entry to change the amounts. Or To unreconcile, you must enter the register for that account, go to the box that has the cleared checkmark, and click on the checkmark until the box is blank. This has to be done on each transaction for the reconcile. Once that is completed, you can reconcile that month again.
Answers & Comments
You actually have 2 options
You can edit the Journal Entry to change the amounts.
Or
To unreconcile, you must enter the register for that account, go to the box that has the cleared checkmark, and click on the checkmark until the box is blank. This has to be done on each transaction for the reconcile.
Once that is completed, you can reconcile that month again.