IRS Forms
Form SS-4, W-9, 2553, 8832 and 8822-B, line by line.
Last updated November 5, 2026
Form SS-4 Instructions, Line by Line
Every line on the EIN application and what actually goes in it, with the entity-specific traps: Line 9a, Line 10, the responsible party, and the date the IRS wants.
How to Fill Out a W-9 as an LLC or Sole Proprietor: EIN or SSN?
Which name goes on line 1, which box to check and which number goes in Part I, for a sole proprietor, a single-member LLC and an LLC taxed as a partnership or corporation, from the form's own instructions.
Form 2553 Instructions: How to File the S Corporation Election
Who can elect S status, the 2 months and 15 days deadline with the IRS's worked example, every line of the form, the two fax numbers and addresses by state, late relief under Rev. Proc. 2013-30, and what the IRS sends back.
Where to File Form 2553: Fax Number and Mailing Address by State
855-887-7734 for the Kansas City states, 855-214-7520 for the rest. The state lists, the mailing addresses, the cover sheet, proof of the filing date, and what to do when no acceptance letter comes.
Form 8832 Instructions: Entity Classification Election for an LLC
How an LLC elects to be taxed as a corporation, when Form 2553 alone is the right form instead, the 75 day and 12 month window, the 60 month rule, every line, the two mailing addresses, and Rev. Proc. 2009-41 late relief.
Form 8822-B Instructions: Change an EIN's Address or Responsible Party
A new responsible party must be reported within 60 days; a new address is voluntary but notices go to the old one until you file. Every line, mailing address versus business location, who signs, where to mail it by old address, and the 4 to 6 week wait.
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