Click on the partial bill required to complete the payment for, which are highlighted in purple.

Click on the check box next for the bill to process payment for

Now, click  to process the selected bills.

Here, receipts can be uploaded using the yellow button in the middle of the form, as well as reviewing the amount that needs to be paid, and selecting the account in which the balance will be deducted from

To submit the payment, first select the payment method by clicking on This will show a list of previously added payment accounts

After reviewing, the payment can be submitted by clicking on the  button in the bottom left corner