If you have access to System Options in Back-office, you will be able to enable the "Delete Day-End" button.
1. In Advantage Back-office, click the left sidebar menu.
2. Click on the System menu.
3. Open the System Options module.
4. Click on the Sales tab.
5. Select the Allow Delete Previous Day-End Procedure checkbox:
6. Pres the "Tab" button on your keyboard.
7. Click on the save button in the navigation bar:
8. A system message will appear: Options Save successful.
9. Click on OK.