- Click on the toolbar button in the lower left corner.
- Go to settings
- Click the button like the one circled in the picture and find a selection named “profile”.
- Find a field named as “invoice NO. Initial” and drop down this page till you find a modify button then turn it on.
- Drop back and you can modify the invoice NO. initial of your store.
- Drop down this page and click “save” to save the change.