How Do I Void an Accounts Payable Check?

If you need to void an Accounts Payable check, you can do so at any time by heading to Banking → Account Register.  

Find and highlight the check you want to void, double-click on it or press the Open button to open the check, then press the Void Transaction button.

The check will be voided and the accounts payable bills will reappear in the pay bills screen for payment.