Tax Forms and Instructions. Mortgage tax is a one-time tax paid when a mortgage is recorded and is NOT part of the property taxes you may pay along with your monthly mortgage payment.Exemption applications must be filed with your local assessor's office. See our Municipal Profiles for your local assessor's mailing address. SmartAsset's New York paycheck calculator shows your hourly and salary income after federal, state and local taxes. Information about Form 1098, Mortgage Interest Statement, including recent updates, related forms and instructions on how to file. Taxpayers should use these forms and guides to apply for local tax abatements and exemptions and file property returns. What information will I need to fill out the form? Find out how much you'll pay in New York state income taxes given your annual income. Customize using your filing status, deductions, exemptions and more.