May 2026 release information

Learn about the latest deadline updates, due date logic changes, and lookup list updates for ONESOURCE Calendar Classic.

Deadline information

The following deadlines may be different for the current tax year due to one-off extensions granted by the tax authority. These deadlines will not be updated in Calendar Classic at this time.
Jurisdiction code
Potential taxpayers or event template name
Calendar deadline
Special extension deadline
Information
USA
Individuals and businesses in Tennessee affected by Winter Storm Fern
January 22, 2026 – June 7, 2026
June 8, 2026
USA
Individuals and businesses in Mississippi affected by the severe winter storm
January 23, 2026 – June 7, 2026
June 8, 2026
USA
Individuals and businesses in the State of Hawaii affected by flooding and mudslides due to severe storms
March 10, 2026 – July 7, 2026
July 8, 2026

Current content priorities

The following Tax Law Updates are current content priorities.
Jurisdiction
Update
France
Gradual phasing out of the Company Value Added Contribution (CVAE) until its final abolition by 2030.
New Jersey
Proposed a new simplified standardized return to replace the CBT-100 and CBT-100U.