Updating an encounter is only possible if you are the same provider who submitted the information to AIR. With this, the pen icon on each encounter is visible to show that it is editable from your end.
Information from other providers is shown in the list but this could not be updated.
To update an encounter you have already sent to AIR for an individual:
Step 1: Click the pen and note icon (Update Encounter) placed along with the record. If your screen is small and you cannot see the icon, just scroll the bar at the bottom of the Immunisation list from the left to the right.
Step 2: The Update Encounter page will show like below. You can edit the Date of Service or any of the vaccine details.
As for the vaccine details, click the episode you want to update to expand the box.
Step 3: Once done editing the encounter, click the SAVE button to complete.
Video: Updating an Encounter