To add a new volunteer task to a task group you open the volunteer task and assign it to the task group.
To get started, select Volunteerism > Volunteer Tasks - from the Argenta main menu on the left side of the screen.
This opens your Volunteer Task list. Search for the task you wish to assign a task group to then click the corresponding open icon   to open the task.
Once the task is open scroll down until you see the "Task Group ID" field (circled below in red). Click the "Lookup" button to lookup the task group that you want to assign the task to.
Click the "Save All & Exit"  button to save your task group to the task.
You have successfully added a task group to a task.