I am 17 years old and my parents just split up.My father is questioning if I am his biological son.mum and I don't want to go trough the test,could my father get court order for me to go for dna

Probably. Where are you?

If it is just a matter of knowing. You can have a home kit done. A little swabing and your done with it. Why after this long is he questioning it?

Yes depending on the state, he can request it. If there is a court order then you will have to do it