You can just say NO to that question. The question is directed at divorced or never married parents who share custody. Answer NO and move forward in the software.
@swatsup Just making sure---you are widowed with a dependent child. For the year that your spouse passed, you can file a joint return. When you have a dependent child, you can file as Widowed for the next two years after that, and you will still get the same standard deduction as you would have received on a joint return. After that you would need to file Single --or with a dependent, Head of Household.