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ir    
n. 红外

红外

Ir
n 1: a heavy brittle metallic element of the platinum group;
used in alloys; occurs in natural alloys with platinum or
osmium [synonym: {iridium}, {Ir}, {atomic number 77}]
2: a board of the British government that administers and
collects major direct taxes [synonym: {Inland Revenue}, {IR}]

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  • News releases for current month | Internal Revenue Service
    IR-2026-33, March 6, 2026 —The Department of the Treasury and the Internal Revenue Service today issued proposed regulations providing general requirements for Trump Accounts, certain definitions relating to Trump Accounts, election rules to open an initial Trump Account by an authorized individual for an eligible individual, and rules for who is the responsible party for the initial Trump
  • 401 (k) limit increases to $24,500 for 2026, IRA limit increases to . . .
    IR-2025-111, Nov 13, 2025 — The Internal Revenue Service announced today that the amount individuals can contribute to their 401 (k) plans in 2026 has increased to $24,500, up from $23,500 for 2025
  • Forms instructions | Internal Revenue Service
    Access IRS forms, instructions and publications in electronic and print media
  • Forms, instructions and publications - Internal Revenue Service
    The latest versions of IRS forms, instructions, and publications If a PDF file won't open, try downloading the file to your device and opening it using Adobe Acrobat View more information about using IRS forms, instructions, publications and other item files Click on a column heading to sort the list by the contents of that column Enter a term in the Find box Click the Search button
  • Payments | Internal Revenue Service
    Pay your tax balance due, estimated payments or part of a payment plan Penalties and interest will continue to grow until you pay the full balance
  • IRS Wheres My Refund
    Refund Status Get Refund Status Please enter your Social Security Number, Tax Year, your Filing Status, and the Refund Amount as shown on your tax return All fields marked with an asterisk (*) are required Social Security Number *
  • Refunds | Internal Revenue Service
    Check your refund status 24 hours after you e-file or 4 weeks after you mail a paper return Check in your account or use the refund tracker, IRS2Go or the refund hotline
  • Newsroom | Internal Revenue Service
    IR-2026-33, March 6, 2026 —The Department of the Treasury and the Internal Revenue Service today issued proposed regulations providing general requirements for Trump Accounts, certain definitions relating to Trump Accounts, election rules to open an initial Trump Account by an authorized individual for an eligible individual, and rules for who is the responsible party for the initial Trump
  • Let us help you | Internal Revenue Service
    Get free tax help from the IRS File your taxes, get help preparing your return, help yourself with our online tools, find your local office – or call us We’re here to help
  • IRB | Internal Revenue Service
    Read the Internal Revenue Bulletin online in a browser-friendly format (HTML)





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