IRS forms, filled honestly
Tax Forms works through one form, line by line. Anything it can’t source from your documents or your answers, it stops and asks about — and every number that lands on the page can be traced back to where it came from.
Free while it supports one form. No tax advice, no e-filing — you review and file it yourself.
One form per session, start to finish, with a document you can review before anything is final.
Work through the form as a conversation. Tax Forms asks one question at a time, shows the IRS instruction for that exact line, and fills the real PDF form fields so the result opens correctly in any reader.
Drop in a W-2 or 1099 and Tax Forms reads the values off it. It still shows you what it read, which page and which box it came from, and waits for you to confirm before using it.
Computed lines are worked out by formulas written and tested by a person against the printed instructions — not by a language model. Each one shows its inputs, so you can redo the sum yourself.
Your SSN is reused next year without asking again. Your address is not — it is proposed for you to confirm, because most of what is true about you changes once a year rather than never.
If two documents disagree, or a document contradicts something you said, Tax Forms shows you both values and their sources and refuses to pick. That is the one moment where guessing would cost you the most.
Every filled box records where it came from and when. Months later you can still answer 'why is this number here?' — which is the question that actually matters if anyone ever asks.
Four steps. You are in control at every one of them.
Choose from the forms Tax Forms supports for a given tax year. Each one has been checked against the printed page by a person before it is offered — a form nobody has reviewed is not on the list.
Tax Forms walks every line on the form. It reads what it can from documents you upload, computes what a reviewed formula covers, and asks you about everything else — with the IRS instruction for that line next to the question.
See the whole form with your values in place, each with a badge saying where it came from. Change anything. Mark anything as not applying to you. Nothing is final while you are here.
Approving is an explicit action, and it is the only thing that unlocks the export. You get the filled PDF to check, print, sign and file however you choose.
Most of the risk in filling a tax form is not a blank box. It is a box with a confident, wrong number in it — because you cannot tell by looking that it is wrong.
So Tax Forms is built so that guessing is not something it can do. Every line on a form is in exactly one known state at all times, and the export is blocked until all of them are either settled or verifiably blank. An empty box on the output means “this does not apply to you”, not “we never got to it”.
Language models are used in exactly two places: reading an uploaded document, and understanding a new form’s layout once, which a person then checks. Arithmetic, the rules about what to ask, and the decision to let you export are ordinary code with tests.
The form cannot be exported while any line is in one of the middle four.
A form appears here only once someone has checked its every line against the printed page and written a tested formula for each computed one.
Employee’s Withholding Certificate · 2026 revision
The certificate you give your employer. Page 1, end to end: personal information, filing status, dependants, other adjustments, and the exempt election.
The Multiple Jobs and Deductions worksheets on pages 3–4 are not covered. Tax Forms asks you for the result and shows you the instruction, rather than computing a number it cannot yet compute correctly.
U.S. Individual Income Tax Return
Not available yet. It brings cross-form dependencies and IRS worksheets, and those need reviewed formulas before they can be trusted.
Saying this plainly is more useful than finding out halfway through.
Your answers and uploaded documents are encrypted before they are stored, with a key derived for your account alone. Nobody else’s key can read them.
Reading an uploaded document means sending it to a hosted language model. That is a real boundary and we would rather you knew about it than found out later. If you would rather not, type the values in instead — everything works the same way.
Start with a W-4. It takes a few minutes, and you will be able to explain every number on it.
Start a form