I was just now declared disabled after repeal after repeal.?

I will be receiving a lump sum of 99,000 going back to 2007. I will also receive 2500 per month. How much will I have to pay on the 99,000 lump sum disability reward. I have one child that I receive 550.00 child support per month. I have twins that were 17 in 2007 and I claimed one as dependent and also one in 2008 when they turned 18. I am so concerned about the taxes that it is making me sick. Please help me so I can adjust to the taxes I will have to pay. I also was making a mortgage payment on my home until 2010.