Payment Approval
The Payment Approval tab is available for all types of invoices and follows the same logic across them. It contains parameters related to approving the invoice for payment through the payment calendar.
The tab includes the following fields:
Approved: A checkbox indicating whether the invoice is approved for payment.
Amount to be paid: The approved amount to be paid against the invoice.
Amount to be paid, %: The approved amount expressed as a percentage of the total invoice amount.
Approval comment: A text field for entering comments related to the approval.

Logic Behind Invoice Approval
Invoice approval logic is as follows:
An invoice is considered approved when the Approved checkbox is selected:
If the checkbox is not selected, all other fields remain read-only.
When the checkbox is selected, the ‘Amount to be paid’ field is automatically filled with the invoice’s outstanding amount. The ‘Amount to be paid, %’ is calculated as the ratio of the approved amount to the total invoice amount.
Changing the value in ‘Amount to be paid’ updates ‘Amount to be paid, %’ accordingly, and vice versa.
If an approval comment is added, the tab header will display a (1) indicator.