The university is working to prepare for a potential scenario where all classes need to be taught remotely for a period of time. Depending on your role as a TA, this transition may have a small impact or a much more significant impact on your teaching. If your TA role involves teaching recitations, labs, serving as a grader or any other similar role where you work closely with a professor you should first talk with your supervising faculty member about if and how these changes will affect your responsibilities. If you serve as an instructor of record, you will want to think about how you can adapt your teaching methods for an online course.
The Center for Transformative Teaching has prepared a helpful website of resources and information for this situation.