Important Deadlines of 2026 (For 2025 Income tax Reimbursement)
| Events | US Based Staff | Overseas Staff |
| Q4 Advance of 2025 | 15 January 2026 | 15 January 2026 |
Statement of Taxable Earnings (STE, equivalent to W2 or 1099) Will be distributed to all staff by email. | 31 January 2026 | 31 January 2026 |
| ST/IC/2026/1 (instruction/rules and procedure) will be posted in UN Forms | 31 January 2026 | 31 January 2026 |
| UN Forms for 2025 (F.65, F.65A, F65B and IRS 4506C) will be uploaded in UN Forms and available for use. | 31 January 2026 | 31 January 2026 |
Income Tax Briefing (VIRTUAL) | 05 February 2026 (Virtual) At 9:30 AM EST | 05 February 2026 (Virtual) At 9:30 AM EST |
| UN Tax portal is open to use | 06 February 2026 | 06 February 2026 |
| 2025 Tax Claim submission Deadline (to UN Income Tax Unit) | 3 March 2026 | 1 April 2026 |
| 2025 Tax filing Deadline to IRS | 15 April 2026 | 15 June 2026 |
| 2025 Tax Settlement Payment Deadline to IRS | 15 April 2026 | 15 April 2026 |