Where do I send Form W-4V?

Not to the IRS — give the completed, signed W-4V to the payer making your payments (for Social Security, that's the Social Security Administration). AttachKit fills and downloads it in your browser; you submit it yourself. This isn't tax advice.

Is it safe to put my SSN in my profile?

Your SSN stays in your browser's localStorage and never syncs to our servers — even when you're signed in (your name and address sync; your SSN never does). AttachKit fills the SSN box on-device, so it isn't sent to any third-party AI.

Can I sign it in AttachKit?

Yes — fill via /fill/w-4v, then click 'Sign' in the menu to add your signature on the same PDF, still entirely in your browser.

Tax · Form W-4V

Fill IRS Form W-4V online — free, in your browser

IRS Form W-4V, Voluntary Withholding Request, lets you ask a payer to withhold federal income tax from certain government payments — unemployment compensation, Social Security benefits, Social Security equivalent Tier 1 railroad retirement benefits, and a few others — so you aren't hit with a big bill at tax time. AttachKit opens the official blank PDF and fills it right in your browser: it auto-fills your first/last name, Social Security number, and mailing address from a saved profile using on-device heuristics, then leaves the withholding-percentage choice (and your signature) for you. Your SSN is filled on-device and never sent to any third-party AI, and your PDF never leaves your device.

Your PDF never leaves your browser — open DevTools → Network and watch: the file is never uploaded.

Who needs it: People receiving unemployment compensation, Social Security or railroad retirement benefits, or other eligible federal payments who want federal income tax withheld voluntarily — and anyone helping a parent or client set that up. You give the completed W-4V to the payer (e.g. the SSA), not to the IRS.

Need a blank Form W-4V? Download from the source, then drop it in below.

Form edition: Rev. January 2026. Page last reviewed 2026-06-24.

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Why fill it here

Auto-fills your name, SSN, and full address from a saved profile, on-device — your SSN never syncs to our servers, even when you're signed in.
Runs 100% in your browser: the PDF never uploads, and any optional AI assist only ever sees field labels, never your document or your SSN.
Free to fill unlimited forms (10 signed PDFs/mo on the free tier); you pick the withholding rate and sign before sending it to the payer.

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Form W-4V questions, answered

General information, not legal or tax advice

This page is general information about a commonly-used tax form. Tax law is complex and fact-specific — for advice on your return, consult a CPA, enrolled agent, or tax attorney. AttachKit fills the PDF; the IRS holds you responsible for what's on it.

Where do I send Form W-4V?: Not to the IRS — give the completed, signed W-4V to the payer making your payments (for Social Security, that's the Social Security Administration). AttachKit fills and downloads it in your browser; you submit it yourself. This isn't tax advice.
Is it safe to put my SSN in my profile?: Your SSN stays in your browser's localStorage and never syncs to our servers — even when you're signed in (your name and address sync; your SSN never does). AttachKit fills the SSN box on-device, so it isn't sent to any third-party AI.
Can I sign it in AttachKit?: Yes — fill via /fill/w-4v, then click 'Sign' in the menu to add your signature on the same PDF, still entirely in your browser.

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Done filling? Also sign a PDF, convert PDF to Word, Word to PDF — or see AttachKit for accountants.

AttachKit is a private, independent tool for filling and signing PDFs on your own device. It is not a government agency, law firm, or filing service, and is not affiliated with or endorsed by the IRS, USCIS, the U.S. Department of State, or any government body. Forms are provided for convenience — always download the current version and instructions from the official .gov website, and your completed document never leaves your browser.