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Online Services will be down for improvements from 5 p.m. on December 4 until 10 a.m. on December 8.

During this timeframe, you will be unable to create, log in to, or complete any transactions in your Online Services account.
   
If you must file during this timeframe, you may file a paper form. If you must pay a bill, use our Quick Pay application, which does not require you to log in. If you received an income request letter (Form RP-5300-WSC), use our STAR Income Worksheet tool.
   
To learn about the upcoming improvements and stay up to date, see December 2025 changes to Online Services and subscribe to receive Online Services emails.

E-file: Corporation tax general information

Starting January 1, 2009, e-filing of corporation tax returns and extensions, and e-payment of any balance due is required for certain corporations:

The New York State Department of Taxation & Finance is participating in the Fed/State 1120 corporation tax e-file program, under the IRS Modernized e-File (MeF) architecture.

  • Corporation that prepare and file their own returns using tax software
  • Tax preparers

You can get more e-file mandate information by clicking on the links below:

You can use NYS approved e-file software to e-file returns and extensions for the current year. In addition, you can e-file prior year returns going back to tax year 2017.

You can find a list of forms supported by our program at e-file supported forms. Check with your software provider to find out if your software supports your filing needs.

For more corporation tax e-file information, please check out the following:

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