Paying support for 3 kids with different mom's

  You will need to file a Petition for Modification in each case for each child.  The court can take into account additional children in calculating child support.   Check on line under Florida Fmaily Law forms and that may give you some guidance.  Because this is a little tricky to navigate, you should also try to call your local legal aid office for some assistance.   Best of luck, Cindy S. Vova Law Offices of Cindy S. Vova, P.A.