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The Internal Revenue Service (IRS) administers and enforces U.S. federal tax laws.

Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the …

Conjugate Ir in every Spanish verb tense including preterite, imperfect, future, conditional, and subjunctive.

Looking for the definition of IR? Find out what is the full meaning of IR on Abbreviations.com! 'Infrared' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and …

Ingenieur, abbreviated ir., an engineer's degree awarded by technical universities in the Netherlands, Belgium, Indonesia, and Malaysia Injured reserve list, a list of professional sports players who are …

Find information on Form 1040, tax relief, regulations, deadlines, tax guidance and more.

Find previous year news releases and fact sheets from 1997 through last month. A listing of current news releases published by the IRS.

IR-2026-23, Feb. 12, 2026 — The Department of the Treasury and the Internal Revenue Service today issued a notice providing guidance for determining whether electricity-producing qualified facilities, …

WASHINGTON — The Internal Revenue Service, working with the U.S. Department of the Treasury, today announced that paper tax refund checks for individual taxpayers will be phased out beginning …