โ1. Open an invoice.2. Click on the purple date below "Date Invoiced" to change the invoice date.3. A dialogue box will pop up. Click the calendar field to select a new invoice date. 4. Select the new date.5. Click on Save6. To change the Due date, click on the purple date below "Due On"7. Click on the Calendar field to select the new due date.8. Click on the new due date.9. Click on Save