I don't know one of my parent's information

<p>I live only with my mom, who is divorced from her second husband. He pays some child support but not much.</p>

<p>What do I fill out for parent #2? I know absolutely nothing about my biological father. For parent number 2, it has the option of "unknown" when it asks for parent type and doesn't require any information (not even a name) except employment status. Obviously I don't know what my biological father does for a living. </p>

<p>I could fill out the information for my mom's ex-husband, even though I don't like him at all. What should I do? It seems like the most accurate thing to do is to leave parent #2 as "unknown" and just assume he's unemployed. </p>