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Reviewed by: William McLee
Reviewed date:
January 17, 2026

What Form NYS-45 ATT (2013) Is For

Form NYS-45_ATT (2013) reports income tax withheld from employees’ wages and Unemployment Insurance contributions for New York employers. You must file it quarterly with the New York State Department of Taxation and Finance to meet New York State Tax Law requirements.

This form is essential for reporting wages, withholding tax, and Social Security numbers for all employees. You can file it using the NYS-45 Web File through Business Online Services to streamline processing and ensure accuracy.

When You’d Use Form NYS-45 ATT (2013)

Form NYS-45 must be filed quarterly by employers to report wages paid and taxes withheld. This includes reporting income tax withheld, Unemployment Insurance contributions, and Paid Family Leave. Filing is mandatory for businesses subject to New York State withholding tax and employment tax requirements.

Each quarter, you must file Form NYS-45 by specific due dates. For example, the first-quarter return is due by April 30, the second-quarter return by June 30, and the fourth-quarter return by March 31. Filing late may result in penalties or interest on unpaid taxes, which can increase your liability.

Key Rules or Details for 2025

For tax year 2025, employers must file Form NYS-45 with the New York State Department of Taxation and Finance by the quarterly deadlines. This includes reporting quarterly wages, income tax withheld, and Unemployment Insurance contributions.

Employers must complete all parts of the form, including Parts A, B, and C, to ensure accuracy and completeness.
Liable employers must comply with New York’s withholding tax rules and consider using Web File for quicker processing.

Step-by-Step (High Level)

  • Step 1 - Log in to Business Online Services: Use your Employer Registration Number and Withholding Identification Number to log in to the NYS-45 Web File. This will enable you to report wages and withheld taxes accurately and efficiently.

  • Step 2 - Gather Employee Information: Collect employee wage data, including Social Security numbers and Personal Income Tax details. Ensure all relevant information is accurate, including Unemployment Insurance and Paid Family Leave contributions.

  • Step 3 - Complete the Form: Fill out Parts A, B, and C of Form NYS-45, ensuring all required data is entered. Double-check details such as wage reporting, withholding tax forms, and contributions to ensure accuracy.

  • Step 4 - Submit and Pay: Review the form, then submit it through Business Online Services. Make any necessary payments for withholding tax or Unemployment Insurance as directed.

Common Mistakes and How to Avoid Them

Filing errors cause delays and processing setbacks. Identifying and correcting these mistakes ensures smoother compliance and approval.

  • Incorrect Employer Registration Number: This mistake occurs when you input the wrong Employer Registration Number. You must verify and carefully enter the correct number for accurate processing.

  • Missing or Incorrect Employee Wage Information: This mistake happens when wages or Social Security numbers are entered incorrectly. Double-check employee wages and Social Security information for accuracy.

  • Filing After the Deadline: This mistake occurs when you submit Form NYS-45 after the due date. You must file the form by the deadline to stay compliant.

  • Incorrect Filing of Part B or C: This mistake happens when income tax withheld or Unemployment Insurance contributions are reported in the wrong section. Ensure the amounts are placed in the correct sections of the form.

What Happens After You File

After you file Form NYS-45, the New York State Department of Taxation and Finance reviews the information submitted. If the form is accurate, your account will be updated, and the filing will be processed. Employers should keep a copy of the filed form for their records.

If discrepancies are found, you will be notified and may need to correct or resubmit the form. You must address any errors promptly to avoid delays or penalties. Correcting errors promptly ensures the proper processing of your quarterly return and compliance with New York State Tax Law.

FAQs

What is the deadline for filing Form NYS-45-ATT?

Form NYS-45 is due on the last day of the month following the end of each quarter. For the first quarter, the deadline is April 30.

Can I file Form NYS-45_ATT online?

Yes, you can file Form NYS-45-ATT online using the NYS-45 Web File through Business Online Services. This method streamlines the filing process.

What is the purpose of Part B of Form NYS-45-ATT?

Part B of Form NYS-45-ATT reports employee wages and corresponding withholding tax. Ensure the amounts match your payroll records for accurate filing.

How do I make payments for withholding tax or Unemployment Insurance?

You must pay withholding tax and Unemployment Insurance contributions electronically through Web File or other approved methods, ensuring timely payment.

What should you do if you find an error on your filed Form NYS-45-ATT?

If you discover an error, promptly correct or resubmit the form. This ensures compliance with New York State Tax Law and prevents processing delays.

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