If you are a full-year Florida resident, and all your work was done remotely from a FL location, then your work income is not taxable by either NJ or NY. If NJ (or NY) taxes were mistakenly withheld, you must file a non-resident NJ (or NY) return on which you enter the withholdings but declare zero NJ (or) NY income. This will result in the incorrectly withheld taxes being refunded to you.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
