Already divorced mother with two minor children,tax and child support questions.

I was dicorced about 5 years ago.when my alimony was paid up about 1 and a half years ago.when my divorce was finalized,my ex husband was able to claim both kids on his income tax due to the alminony he was paying.my lawyer at the time told me when the alimony was done i can then claim one of the children. how do i do i leagally go about doing this.i also would like to see how i go about getting an increase on my child support and if i can get any help with child care added in my child support.my yearly income is about 8,600 a year and he makes any where from 50,000 to 70,000 a year.he also covers the children on hes medical.right now i am recieving 800.00 a month in child support.my children are 10 and 6.i am custodial and residential parent. - Is this your question? Add additional information