Go to the Invoices screen as described earlier in the Pre-requisites.
Click on the Complete Details option from the Actions column, as shown below.
The medic will display the below screen. Any utility such as: Labs, Imagings, Procedures, or Drugs, added during an encounter, will become available on this screen. The consultation fee (for consultative encounters) also becomes available under the Services & Products section.
To edit the invoice details from any section/utility (Services & Products, Labs, Imagings, Procedures, Drugs), click the Actions icon button (3 dots) available in front of the row whose details are required to be edited.
It will display the options: Edit Discount, Edit Quantity, Remove, and Update Price, as highlighted in the image below.