Tax Year 2026 Publication 1345 is Available on IRS.gov

Internal Revenue Service (IRS) sent this bulletin at 11/02/2026 11:31 AM EST

QuickAlerts for Authorized IRS e-file Providers/EROs

November 2, 2026

Attention: Software Developers, Return Transmitters and Authorized IRS e-file Providers/EROs

Publication 1345, Authorized IRS e-file Providers of Individual Income Tax Returns is now available on IRS.gov.

This revision replaces the previous edition revised November 2025.

Updates in Pub 1345:

Updated National Institute of Standards and Technology (NIST) guidelines
Added paragraphs to the Software Developers section
As part of ongoing efforts to strengthen fraud detection and security across the e-file ecosystem, the IRS is implementing secure APIs, including real-time Electronic Filing Identification Number (EFIN) Validation and Vendor Control Number (VCN) Registration services.
Updated to reflect the guidance in Executive Order 14247 stated in Chapter 3
Updated Transmission requirements
Updated Debt Indicator
Updated Three-Deposit limitation

This publication is a great way Authorized IRS e-file Providers can stay up to date on the latest IRS e-file requirements. Applicants and participants should read this publication to become familiar with the requirements for acceptance or continued participation.

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e-file Resources

Tax Year 2026 Publication 1345 is Available on IRS.gov

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