When your task is complete, you need to finish the project to export your work to the Community Portal and finish the task.
Go to Project > Finish project
A pop-up will appear explaining that you will not be able to work on your task again after finishing the project. Click Yes to continue.
You will now see a page that displays ‘Closed successfully’. Your task is automatically uploaded to the Community Portal and you do not need to do anything more. Hooray!