Fill IRS forms online — free, no Acrobat
Fill IRS forms (W-4, 1040 schedules, etc.) in your browser. Auto-detects fields. Flatten to lock values before submission.
Most modern IRS forms are fillable PDFs (AcroForm). The W-4, 1040 schedules, W-9, and most state tax forms work with our auto-detecting form filler. Fill in your browser, flatten before submission so the values are locked in.
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Frequently asked questions
Is this safe for SSN-bearing tax forms?
Files are auto-deleted within an hour and transmitted over HTTPS. For maximum safety with PII, self-host — our stack is open source and easy to deploy on your own server.
Does it work for very old IRS forms?
Some pre-2010 IRS forms used XFA, a separate (deprecated) standard. Those don't work. Modern forms (post-2015) are nearly always AcroForm and work fine.