Step 1 - Delete the ACH file from Generate ACH File window >> Mark the ACH file and click delete.
Step 2 - Void the Check/Checks that were entered into Payroll. >> Transactions >> Void Payroll Checks. This will reverse the posting and payroll records created.
Step 3 - Enter a manual check that matches the bonus checks manually created. Be sure to include any deductions that need to be included. >> Transactions >> Manual Checks.
You will be able to assign a check number to the manual check that will match the one that clears the bank.
I hope this helps,