IRS announces tax relief for taxpayers impacted by severe storms and flooding in Sisseton-Wahpeton Oyate located in Lake Traverse Reservation; various deadlines postponed to Feb. 2, 2026 SD-2025-01, Oct. 29, 2025 IRS announces tax relief for victims of severe storms, straight-line winds and flooding in the Cheyenne River Sioux Tribe; various deadlines postponed to Feb. 3, 2025 SD-2024-14, Nov. 12, 2024 IRS announces tax relief for victims of severe storms, straight-line winds, and flooding in South Dakota SD-2024-13, Aug. 23, 2024 IRS provides relief to South Dakota victims of severe storms, straight-line winds, flooding; various deadlines postponed to Feb. 3, 2025 IR-2024-222, Aug. 23, 2024 How to contact your local IRS office