The Turbotax questionnaire is asking for my Spouse's SIN. My spouse is not is Canada and hence does not have a SIN. It won't let me move forward, what to do?

In the questionnaire, i chose my marital status as married, but i also selected the option to file taxes only for myself and not my spouse. The form is still asking me for my wife's SIN, which does not exist. It won't let me move forward unless i put that information in.