1. To void a transaction just click on the 'Calendar'.
2. After that, select an appointment & select 'View Contact' button.
3. Now head over to the 'Financials' tab. There you can see all the transactions.
To void a transaction simply click the 'recycle bin' button.
4. Once you have clicked on it, you will be asked if you are sure. Click Void or exit the page.