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Form 1120-SF online Oregon: What You Should Know
May 2016) Oct 2, 2025 — Form OR-40, Oregon Individual Income Tax Return of a Foreign Corporation. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) (Effective for all tax years beginning with and ending on or after) (Rev. May 2017) Dec 30, 2025 — Notice of Assessment, Oregon Individual income tax return. Form W-4, Federal Insurance Contributions Act for Individuals with a Disability. (Effective July 2018) Jul 30, 2025 — Statement of Estimated Tax, Oregon Individual income tax return. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) Jun 24, 2025 — Notice of Assessment, Oregon Individual income tax return. Form W-4, Federal Insurance Contributions Act for Individuals with a Disability. (Effective July 2018) July 2, 2025 — Notice of Assessment, Oregon Individual income tax return. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) (Effective for all tax years beginning with and ending on or after) Dec 23, 2025 — Notice of Assessment, Oregon Individual income tax return. Form W-4, Federal Insurance Contributions Act for Individuals with a Disability. (Effective July 2018) Note: Not all information available for the current year Oct 9, 2026—Annual Form W-4, Federal Insurance Contributions Act for Individuals with a Disability. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) Oct 15, 2025 — Notice of Assessment, Oregon Individual income tax return. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) Nov 14, 2025 — Form W-3, Transitions to Oregon Individual Income Tax. Transitional filing option available only to certain taxpayers, including the following: (Rev. Jan 2017) Oct 18, 2025 — Notice of Assessment, Oregon Individual income tax return. Form 8582 (SCH H) Allocated to Effectively Connected Income Under Regulations (Rev. May 2016) Oct 21, 2025 — Notice of Assessment, Oregon Individual income tax return.
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