It sounds like you will be due a refund via an amended return, @croka. Based on the facts you present, and presuming that you were teleworking for a NY-based employer once you moved to Florida, your income was taxable to New York State (part-year as a resident and part-year nonresident). But for NYC, you would only be liable for tax for the portion of the year in which you were physically residing in NYC, as New York City does not tax nonresidents.
I can't see your tax return, but I do suspect you may have filled out the wrong form for New York, which may have caused the experience you had. Check your New York State paperwork to see if you filed a New York resident return (Form IT-201). Because you moved during the year, you should have been using New York's Part-Year/Nonresident return (Form IT-203). If you were inside of the New York resident return, it would explain why the NYC/Yonkers information may have been greyed out. With a nonresident return, (which would have allowed you to define your New York state residency), you would have defined your NYC residency as well, and would not have paid NYC tax for the nonresident period.
The following Help Article will assist you to prepare and file a New York State Amended Return: I need to amend my state return (click on link). If you take those steps and still are not able to amend the return, call into customer support for additional assistance and ensure there's not a technical issue that is preventing you from making the desired change.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
