To void a paycheque:

1.  Click Edit, Payroll, and Details.
2. In the Employee Number field, select the employee and press the Tab key.
3. Under the Timecard tab, highlight the timecard cheque you wish to void.
4. Click the Void cheque icon.
5. Click Yes to this message "The voiding of a paycheque will automatically reverse timecards entries. Do you wish to continue?".

You'll see a negative supplemental timecard that reverses the original timecard.