Privacy
Your salaries stay in your browser.
The short version: we don’t want your data, we don’t ask for an account, and your salaries and filing status never leave your device. Use this page like you would a paper worksheet.
What we don’t collect
- No account, no email, no name, no phone number.
- Your salaries and filing status are processed entirely in your browser. They are never transmitted to our servers.
- We save nothing about your inputs server-side, and we don’t sell, share, or rent any user data — we don’t have any to sell.
What we do collect
Anonymous usage analytics. We use Cloudflare Web Analytics, a cookieless, privacy-first tool that measures aggregate traffic and performance (page views, browser type, country from IP — not stored). It sets no cookies, stores no personal data, and doesn’t track you across sites. Because it’s cookieless it runs for all visitors and needs no consent — it isn’t tied to the Analytics cookie toggle.
Advertising
This site is free because it’s supported by display advertising. Our advertising partners may set their own cookies on your device to serve relevant ads and measure performance. We explicitly do not share any financial information you enter — your salaries, filing status, or results — with any advertising or analytics partner. You can opt out of personalized advertising via aboutads.info or your browser’s privacy controls.
EU, UK, and Switzerland visitors see a consent prompt before any non-essential (advertising) cookies are set. Our cookieless analytics measure aggregate traffic only and run without a prompt. You can review or change your cookie choices at any time — .
California residents
California residents have the right to opt out of the “sale” of personal information. Under CCPA’s broad definition, our use of behavioral advertising cookies may qualify. To opt out, use the cookie consent controls or enable the Global Privacy Control (GPC) signal in your browser — we honor GPC.
Deleting your data
Because we don’t store anything server-side, the only place your inputs exist is on your device. To delete them, clear your browser’s site data for line4c.com.
Children
This site is not directed to children under 13, and we do not knowingly collect any information from children.
Third-party links
Links to the IRS (irs.gov) and to our sibling tools lead to their own websites; we don’t control or speak for their privacy practices.
Contact
Line 4C.com is operated by Red Goggles LLC. For privacy questions, email [email protected] or see our contact page.
Last updated: June 4, 2026