I appreciate you for joining this thread, Dam26. We're unable to reverse a voided paycheck in QuickBooks. Though, I've got a couple of things we can do to take care of this. I'll share the steps and details below.

To start, let's secure a backup copy of your company file to ensure you have the original data. You can restore it in case of accidental loss or damage.

If you meant you've voided a written check, you can simply re-create it with its exact and correct details. Once done, you can manually clear them in your account register so that future reconciliations will not create discrepancies from previous periods.

On the other hand, if it's a regular paycheck, you can just recreate the voided paycheck with the exact and accurate details. Then, manually 

clear them in your account register so your future reconciliations will not have any discrepancies from previous periods.

However, if it's a direct deposit, you can create a direct deposit offset payroll item when recreating voided direct deposit paychecks sent to employees' accounts. It is to zero out the net pay amount so your employee doesn’t get paid again.

Alternatively, we can generate a journal entry for this check since it was written off in a closed period. If you need further assistance on what accounts to use for the entry, I recommend seeking help from your accountant to ensure that your books are accurate.

Additionally, you'll want to run and customize your payroll reports to help you view helpful information about your business and employees' paychecks.

Let me know if you have any other concerns with your previous year's checks in QuickBooks Desktop. I'm always right here to get you covered. Stay safe, Dam26.