Editorial Policy and Corrections

This page explains how the guides and figures on Taxolase are made and checked, including the part AI plays, so you can judge how far to rely on them. It also lists the mistakes we have corrected since publishing.

Who writes the content

Guides are published under The Taxolase Team. The site is an independent project. We are not accountants, tax advisers or lawyers and hold no tax licences, and nothing here is professional advice. See About and the disclaimer.

What AI is used for

AI tools help draft guides, write code and run checks. We do not treat their output as a source. A claim only stays on the site if it can be tied to a source listed on the page or to a calculation we can reproduce.

How a guide or figure is checked

• Sources first. Rates, limits and thresholds are taken from official material where we can read it: tax authority pages and forms, statutes, and official announcements. Each guide lists its sources.
• Secondary sources are labelled. US state rates start from the Tax Foundation's annual tables. Each state page says which figures we confirmed against the state's own revenue department or statute, which we could not confirm, and where a state changed its law after the table was published.
• Worked examples are computed, not typed. Every example in a guide comes from the same calculation code as the calculator, and automated tests compare each one with a hand-worked result. If a rate changes in a way that would make a guide wrong, the tests fail before the change can be published.
• Dates are shown. A guide shows “Updated” only when its facts were re-checked against its sources on that date.
• Uncertainty is stated. When we could not verify something, the page says so instead of presenting it as settled.

What we do not do

• We do not invent authors, credentials, reviews or statistics.
• We do not let advertisers or affiliate partners influence a calculation or a guide's conclusions. Affiliate and advertising relationships are described on the About page.
• We do not give personal advice. Results are estimates for a stated situation.

Known changes coming up

• Washington voters decide on 3 November 2026 whether to repeal the state's new 9.9% tax on income above $1 million. We will update the affected guides after the result.
• The Thai ESG deduction window we describe closes on 31 December 2026, so those guides will be reviewed before the 2027 tax year.

Corrections log

If you find a figure that looks wrong, email contact@taxolase.com with the page, the figure and a link to the official source. Corrections we have made:

• September 20, 2026 — Maine state page. The standard deduction was listed at $8,350 single / $16,700 joint. Maine Revenue Services' 2026 rate schedule sets it at $15,700 / $31,400, and the bracket amounts were $1 too low. Both are corrected, and the page now notes the phase-out and the new 2% surcharge above $1,000,000 that the calculator does not model.
• September 20, 2026 — Guide: Marginal vs Effective Tax Rate. The title and text said a raise never leaves you with less take-home pay. That holds for tax brackets alone, but income-tested credits and benefits can phase out as income rises. The guide was retitled and now says so.
• September 20, 2026 — Guides: US take-home pay by state, and states with no income tax. Washington's 9.9% tax on income above $1 million was described as facing a proposed repeal vote. The repeal initiative has qualified for the 3 November 2026 ballot; the guides now say so and cite the source.
• September 20, 2026 — Guides: federal brackets and standard deduction. The text said every filer gets the standard deduction automatically. Filers choose between the standard deduction and itemizing, so the wording now says most filers can take it.
• September 20, 2026 — Guide: Australian tax rates 2026–27. The super salary-sacrifice example showed the income tax saving without the 15% contributions tax the fund pays. The net benefit is now shown as well.
• September 20, 2026 — Guide: UK Personal Allowance and taper. The marginal rate in the £100,000–£125,140 band was described as 'above 60%'. It is 60%, and the wording is corrected.
• September 20, 2026 — Home page. A card claimed the data is structured from each country's own tax authority. Most US state figures come from the Tax Foundation's tables checked against state sources where reachable, so the card now says rates are sourced and each page lists what was checked.