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Information about Form 8453-CORP, E-file Declaration for Corporations, including recent updates, related forms, and instructions on how to file. Form 8453-CORP is used to authenticate an electronic Form 1120, authorize an ERO or ISP to transmit via a third-party, and authorize a corporation's consent to direct deposit any refund or electronic funds withdrawal for payment of federal taxes owed.

Information about Form 8881, Credit for Small Employer Pension Plan Startup Costs, including recent updates, related forms and instructions on how to file. Eligible small employers use this form to claim the credit for qualified startup costs incurred in establishing or administering an eligible employer plan.

Software developers use ATS scenarios to test their new software for Corporate returns for tax year 2021

Tax Year 2022 ATS scenarios are provided to Software developers and transmitters before ATS testing beginning October 24th, 2022.

The Tax Year 2023 Form 1120 Modernized e-File (MeF) Assurance Testing System (ATS) Information provides information to Software Developers and/or Transmitters about the release of scenarios for Tax Year 2023.

TY 2024 1120 Modernized e-File (MeF) Assurance Testing System (ATS) Information provides information to software developers and/or transmitters about the release of scenarios for tax year 2023.

Examination and closing procedures Form 869, Look-Back Interest

Learn how to e-file an automated extension using Form 7004 and the restrictions that apply.

CP 266 notice generates when Chief Counsel receives a referral of your Form 2553, Election by a Small Business Corporation.

We've accepted your S Corporation election per Form 2553, Election by a Small Business Corporation.