I voided the wrong check. How do I correct that?
When you void a check, it puts a flag in the record that shows it's been voided. It also adds the date voided to the record. These are simply flags that don't really affect the ledger. They just indicate the check has been voided. In addition, the other update that takes place is a reversing journal entry is created. This is the only thing that really affects the ledger.
Therefore, if you no longer want the check to be "voided," you may delete the voiding journal entry. Although the void flag and void date will remain, the check will be in the ledger as a normal check (a credit to cash and a debit the offsetting account) and will be available to reconcile as a normal check. The reversing journal entry is now gone.
If you want 'cleaner' books, you may leave the voiding entry and re-create the check by creating a bill and clicking the assign check number. You would have to add a letter to the end. However, if the original check was dated in a closed accounting period, you will not be able to back date this new assigned check.