A question on the form of Change of Address. Waiting online. Tha

I am using my OPT (expires on Aug. 20, 2007) to work as a faculty member and applying for my H1B visa. I am not sure what the answer is in the following item

If not a Permanent Resident, my stay in the U.S. expires on ______

Thank you soooooooooooooooo much.