Find IRS forms and answers to tax questions.

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.

Looking for online definition of IR or what IR stands for? IR is listed in the World's most authoritative dictionary of abbreviations and acronyms.

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 …

The meaning of IR is iridium.

Dec 10, 2025 · Find e-Services tools for tax professionals, reporting agents, the mortgage industry, payers and others to complete IRS online transactions.

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 …

Tax tips, filing season news, and more. Get IRS tax news and sign up for e-News updates. Find information on Form 1040, tax relief, regulations, deadlines, tax guidance and more.

In smaller companies, the IR function is often outsourced to independent investor relations firms. Investor relations is considered a specialty of public relations by the U.S. Department of Labor.