In order to extend assessment dates for a particular student in a batch, you can:
1. Click on "Courses" in the side navigation bar.
2. Select "Batches"
3. Click on the batch for which the end date is to be extended for the learner.
4. Once done, select the "Settings" tab
5. Select "Manage Assessment Plan".
6. Once done, click on the drop-down indicated by three dots against the assessment for which you intend to change the assessment dates.
8. Change the dates here.
9. Choose the students for whom you want to edit the assessment date.
10. Save.