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

What Form NYS-45 (2021) Is For

You use Form NYS-45 (2021) to report quarterly payroll taxes and wage information to New York State after completing employer registration. It covers Withholding Tax, Unemployment Insurance, and state income tax reporting required by the New York State Department of Taxation and Finance for registered employers.

You file quarterly using your Employer Registration Number and Withholding Identification Number to reconcile Form NYS-1 payments for the reporting period. Accurate filing allows the Department of Taxation and Finance to match payroll records with employee wage data and Social Security numbers during compliance reviews.

When You’d Use Form NYS-45 (2021)

You use Form NYS-45 each quarter after paying wages subject to New York State withholding requirements following Employer Registration with the Department of Taxation and Finance. You must file even when no state income tax payments were due during the reporting period, including periods with Form NYS-1 submissions.

Filing applies once you complete employer registration and receive an Employer Registration Number and a Withholding Identification Number from New York State authorities for tax purposes. You follow the same quarterly filing schedule as other employers with employees performing services in New York State, regardless of business age.

Key Rules or Details for 2021

For tax year 2021, you must report wages paid and taxes withheld for each quarter on Form NYS-45 as required by law. You must reconcile reported amounts with Form NYS-1 payments and ensure that the figures match payroll records and withholding tax forms for compliance reviews throughout the year.

The New York State Department of Taxation and Finance recommends electronic filing, although paper filing remains an option under the department’s rules. After employer registration, you use your Employer Registration Number and Withholding Identification Number to meet quarterly state income tax obligations.

Step-by-Step (High Level)

  • Step 1: Log in to Online Services after completing employer registration using a reliable internet connection and gather your payroll records, Form NYS-1 details, and identification numbers.

  • Step 2: Select the NYS-45 Web File from the Web File applications and enter the employer information, including the Employer Registration Number and Withholding Identification Number, carefully.

  • Step 3: Enter quarterly payroll totals, employee wage data, and withholding amounts required for state income tax reporting to the Department of Taxation and Finance.

  • Step 4: Review automatic calculation results, confirm Unemployment Insurance figures, and verify totals align with Form NYS-1 payments for the quarter before final submission.

  • Step 5: Submit the return through the New York State Department of Taxation and Finance system and authorize payment if a balance is due.

Common Mistakes and How to Avoid Them

Employers often submit Form NYS-45 with avoidable errors that interrupt processing. Identifying each mistake and the required correction improves filing accuracy and compliance.

  • Incorrect Identification Numbers: This mistake occurs when you enter an incorrect Employer Registration Number or Withholding Identification Number during setup. You must confirm both numbers against registration records before submission.

  • Wage Reporting Mismatches: This error occurs when reported wages do not match payroll records or Social Security numbers. You must reconcile totals with payroll records before filing.

  • Missing Form NYS-1 Payments: This mistake occurs when quarterly payments do not match Form NYS-1 records. You must reconcile all costs for the reporting period.

  • Improper Filing Method: This mistake occurs when you use non-approved filing methods instead of Web File. You must file using the approved systems provided by the Department of Taxation and Finance.

  • Failure to Correct Errors: This mistake occurs when prior errors are left uncorrected. You must file Form NYS-45-X to correct reported information.

What Happens After You File

After you file Form NYS-45, the New York State Department of Taxation and Finance reviews your submission for accuracy and completeness. When accepted, your account updates employment tax and state income tax balances using information tied to your Employer Registration Number.

You should keep confirmations, payroll records, copies of Form NYS-1, and identification details, such as your Withholding Identification Number, for future verification and audit reference purposes. If the Department of Taxation and Finance finds errors, you must file Form NYS-45-X and respond via Online Services or mail within the required response deadlines.

FAQs

Who must file Form NYS-45?

You must file if you pay wages subject to New York State withholding after completing the employer registration process. This includes employers with workers in New York City or Yonkers.

Can you file Form NYS-45 online?

You can file through Online Services using the Web File provided by the New York State Department of Taxation and Finance. The system offers free access and automatic calculations.

What information do you need before filing?

You need payroll totals, Form NYS-1 payment records, and identification numbers. These include your Employer Registration Number and Withholding Identification Number.

Can a tax professional file for you?

A tax preparer, enrolled agent, or volunteer tax preparer may submit the return for you. They must follow the Department of Taxation and Finance authorization requirements.

How long should you keep Form NYS-45 records?

You should keep payroll records and filed returns for at least four years as required by law for compliance purposes. These records support state income tax verification during future reviews.

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