There are 4 different invoice statuses on the platform:
unpaid
installments
dispute
paid.
All invoices are automatically set as unpaid or paid depending on the status in your accounting software. You can manually change the status from unpaid to dispute or installments.
To change the status of invoices you will have to go to the full customer page.
Customer Page ➡️ Invoices Tab ➡️ Select the relevant invoice ➡️ Select the invoice drop down status.