Taxes owed for class action lawsuit

Hello,

I was the lead in a class action lawsuit that paid out $300,000 but I received a 1099-MISC for the entire amount ($300,000) even though my portion (after attorney fees, etc.) was only $10,000!!!

How can I subtract the $290,000 from my taxes?

Thanks!

P.S.  did they send me the 1099-MISC vs the attorneys and why didn't they break down things and send me just a $10,000 1099-MISC form?