I have to file Form 8615 because most of my income is unearned and I am under the age of 24. They asked me to fill out lines A and B. My parents are divorced and they do not live in the US and they are not US citizens. So who do I put as parent on lines A and B, when neither of them have a social security number? I decided to put [social security number removed] as I usually do, turbotax is not letting me.