请问： 拿到OPT后，先不修改i-20信息，回国一下，可以回美后再改i-20吗？谢谢！
-When you applied for OPT, the International Student Office should have extended your I-20 by writing on the I-20 (you can find the extension note on the I-20). You must talk to your International Student Office before you leave. Also, you need to have a job offer before you leave if you complete your study/degree program.
