The data you store in QuickBooks is crucial for running your business, managing your finances and paying your taxes. Most QuickBooks users depend on some sort of online backup for their data security and peace of mind.

QuickBooks reconciliation is a process in which transactions that you have entered into QuickBooks Online are matched against your bank records and credit card accounts.

To void a check that was included in a previous bank account reconciliation, you'll need to undo the reconciliation, and then you can proceed with the steps listed above to void the check.