My spouse does not have a ssn and no ITIN.

I cannot go to next step as it asks me to put in my wife's ssn/itin information. But she does not have a SSN/ITIN. I am a F-1 visa student and my wife is my dependent with F-2 visa. I want to add her in my tax return form jointly. But she does not have any income claiming a tax return. I am blocked to move forward before putting in her SSN/ITIN. What am I supposed to do?