There are time limits, usually 10 days or 30 days, to appeal such a ruling, however, you can move to modify an existing order based on a substantial change of circumstances, which you can argue this indeed is. It would be a good idea to contact an attorney who handles family law cases to further advise you on your specific situation.
Has your child support order been registered or domesticated in Florida? If not, you may still be under New York jurisdiction, and Florida law and guidelines may be irrelevant. Check with a local lawyer to see if Florida law applies. If so, you can file for a child support modification if your income permanently changes by more than $50 per month or more than 15% since the last child support order. If New York law applies, you should talk to a New York lawyer.
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