Report an error

What to send

A report we can act on immediately has three things. If you only have the first two, send them anyway — we will go find the source.

• The page URL. Paste the exact address. State pages differ from the national tool, and the same figure can be right on one and stale on another.
• The figure you believe is wrong, and what it should be. Name the specific number — a bracket threshold, a standard deduction, a rate, a wage base — not just "the result looks too high". If it's a calculated result rather than a table figure, include the exact inputs you used, the result you saw, and the result you expected.
• Your source — ideally the primary one. A link to the state Department of Revenue, Comptroller, or Tax Commission page, or to the IRS or SSA page, is the fastest possible fix. A bill number or a form name works too. Links to news write-ups or third-party tax tables are still useful as a pointer, but we will verify against the government document before changing anything.

How to reach us

Send it through contact. There is no form to fill in and no account to create — an email with the three items above is all we need.

What happens next

We reproduce the calculation, then check the disputed figure against the primary source — the state's own published schedule or the relevant IRS or SSA publication — rather than against the aggregator tables that are usually what got it wrong in the first place. Our reasoning for this is on the editorial policy page.

Then one of three things happens, and we'll tell you which:

• You're right and it's a data error. We update the figure in the versioned data file, add or update the citation and the change note, and re-run the test suite. The page's "last reviewed" date moves with it, so the correction is visible on the page itself.
• You're right and it's a math error. We fix the function and add a test that asserts the correct hand-computed value, so that specific error can never come back.
• The figure is right but the page was unclear — often a tax-year mismatch, a modeling limitation, or a withholding-versus-return difference. Then we fix the wording, because a correct number that reads as wrong is still our problem.

Our commitment

We aim to review every report promptly, and reports about a specific figure with a source attached get looked at first. We are not going to publish an hours-or-days guarantee we can't honor — but we will read your message and reply to it.

Verified data corrections ship with the next deploy. The corrected value, its citation, and its verification date all live in the same data file, so when a fix goes out the page that shows the figure and the update box that dates it change together — they cannot disagree. Federal data is currently stamped tax year 2026, last verified July 22, 2026; each state page carries its own tax year and verification date.

If a correction reveals that a figure was wrong for a meaningful stretch of time, we say so in the change note rather than quietly overwriting it.

Already-known limitations

Some things aren't errors — they're documented limits of the model. You're still welcome to report them (it tells us what to build next), but here is what we already know:

• Local and city income taxes are not modeled — federal and state only.
• No tax credits are applied, at either the federal or state level.
• State standard deductions are applied as flat amounts; deduction phase-outs and tapers are not modeled.
• State disability and paid-family-leave payroll contributions are not deducted.
• Calculations assume the standard deduction, not itemized deductions.
• 5 states are deliberately still on 2025 tables because at least one figure needed for 2026 hasn't been published yet. Those pages say so. If your state has since published, that is a genuinely useful report — send the link.

The full version of this list, with the reasoning behind each limit, is on the editorial policy page. Per-tool assumptions are on each tool's methodology page.

Ready to send one? Contact us. Curious how the data is verified in the first place? How we build and check these calculators.