I accidentally entered a TFI 3.0, but I need to take the 2.1. How do I fix the scores in PBIS Assessment?

You will first need to delete the TFI 3.0. As a coordinator, you can delete or edit any surveys that you've entered. From your Dashboard, click on the number listed under Completed next to the survey you need to edit. That will take you to the page where you should see the View & Edit or Delete button.
  

You will then need to open a TFI 2.1 window. From the Organization Overview page for any organization you coordinate, you can open a survey window for that organization specifically. From the Organization Overview page for any school you coordinate:

1. Select a survey from the Select a Survey drop-down menu.
2. Type or select an open date from the Open Date field.
3. Type or select a close date from the Close Date field.
4. Click Open Survey.
5. The survey window will appear in the Currently Open Surveys list if the open date is on or before today’s date. The survey window will appear in the Upcoming Surveys list if the open date is after today’s date.