How to revert a voided check from a closed period?

Hi there, @Gumiho.

We can perform a mini reconciliation to make corrections on your reconciled accounts. This way, you don't have to redo everything. 

Let me show you how:

1. Go to the Banking menu and select Reconcile.
2. Choose the bank account in the Account drop-down list.
3. In the Statement  Date field, enter date for an "off-cycle reconciliation." This date can be any date between your last reconciliation and the next scheduled one.
4. Enter the balance of your last successful reconciliation in the Ending Balance field
5. Select Continue.
6. In the Reconcile window, check off the transactions you are fixing and re-reconciling.
7. Make sure the Difference field shows $0.00.
8. When everything looks good, click Reconcile Now.

Additionally, you can run the Previous Reconciliation report in QuickBooks Desktop. This will help you find discrepancies and other issues in your past reconciliations.

Please know that our doors are always open to help you with any QuickBooks-related concern. Take care and enjoy the day! 

So unless I recreate the check that was voided in the previous closed period, a mini reconciliation will not work.