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ONESOURCE Income Tax
release schedule

This schedule can be used to assist you in tax season planning.
This schedule represents the minimum number of releases. We'll provide interim updates as needed.
important
Because our receipt of IRS forms dictates when specific forms can be released, this schedule is subject to change.
Current year release schedule
Release date
Release version
Included in release
November 20, 2026
2026.005
  • Federal tax applications: 1065, 1120, 1120-C, 1120-S, 1120-REIT, 1120-PC, 1120-L,1120-F
January 8, 2027
2026.015
Updates as needed
January 22, 2027
2026.019
Updates as needed
February 5, 2027
2026.022
Updates as needed
February 19, 2027
2026.025
1120 federal e-file for mixed group consolidation
March 26, 2027
2026.035
Updates as needed
April 23, 2027
2026.045
Updates as needed
May 21, 2027
2026.055
Form updates as needed
June 22, 2027
2026.065
Updates as needed
July 23, 2027
2026.075
Form updates as needed
August 20, 2027
2026.085
Updates as needed
September 24, 2027
2026.095
Form updates as needed
October 29, 2027
2026.105
Updates as needed

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