Generate IRS letters, navigate LLC formation in any state, and understand your tax obligations — free, private, no account required.
Click any state for its step-by-step formation guide and tax overview. All 50 states + DC, free.
Notify the IRS when your LLC or corporation adopts a new legal name. Fill in the fields, print, sign, and mail — done in 60 seconds.
File your S-corp election with the IRS. Validates the effective date, explains the late-election window, and includes Rev. Proc. 2013-30 late-relief language.
Notify the IRS of a new principal business address or change in responsible party. Required within 60 days of the change.
File a 6-month extension for your business return (1065, 1120-S, 1120). Automatic approval — no reason required.
Extend your personal Form 1040 deadline by 6 months. Extends the filing deadline — not the payment deadline.
Step-by-step EIN application — including the fax/mail route for foreign founders without an SSN who can't use the IRS online portal.
Rules, definitions, and conditionals — structured like a reference manual, not an advisor. Every guide closes with "confirm with a professional."
The thresholds, the reasonable-salary catch, the payroll overhead, and how to run the numbers yourself without a CPA telling you what to decide.
The on-time window (§1362(b)) vs. late-election relief (Rev. Proc. 2013-30) — what backdating really requires from your books and prior filings.
The exact letter format, where to mail it, what supporting documents are needed, and the state filings that must happen first.
What "reasonable" means to the IRS, the factors they consider, and the range-calculation method most CPAs use for small S-corps.
TheLLCWiki encodes rules, definitions, and conditionals — a reference manual, not an advisor. When a tool routes you to a professional, it's because your specific facts matter in a way no tool can safely handle.
Get connected with an accountant who knows LLCs, S-corps, and small business tax compliance — in your state.
Professional referrals — coming soon