I live in Florida.

If someone can please help me with this....
I got divorced in 2004 and left my son (his mother) the equity from the sale of the house totaled about $70K+, she divorced me when I was out of the city (the summons were delivered to my little brother). Now, she wants to retroactive child support since the divorce. she got full custody and final judgment states she did not want child support, then she modified in 2006 stating she wanted child support but I was never served. I modified the final judgment for visitation rights and shared parental responsibility and I just started making child support payments last ($700.00 not including arrears) month and I need to know if the money I left her can go towards the arrear child support payments or how many years back I have to pay at what rate (income now or income in those years).

Also, Is there a minimum of income in the child support guidelines? Should her husbands income be formulated in the guidelines?