Product wording checked on 17 October 2026. Tax examples retain their stated dates; check the current official source before acting.

There's a word that does a lot of quiet work in tax: warranted. It means a credentialed professional has put their name, and their professional standing, behind a piece of work. If it's wrong, there's a real person, with a real licence, who is accountable.

This is the thing AI cannot manufacture, and it's exactly the thing tax requires.

"An app told me" is not a defence

You can build a tax engine that's right 95% of the time and presents every answer with total confidence. Your users will love it right up until the 5%. When a tax authority disputes a filing, "the software calculated it" carries no weight. The obligation sits with the taxpayer, and behind any reliable filing there is, by design, a credentialed human who reviewed it and is accountable for it.

So a tax layer that only outputs AI numbers isn't a tax layer, it's a very confident calculator with a liability problem. The moment a user files something or makes a decision based on it, the absence of a real accountant stops being a UX detail and becomes the entire risk.

Where the human actually sits

The mistake is thinking "add an accountant" means "put a human in front of every answer." That's slow, doesn't scale, and isn't what most questions need. The right model is layered:

Reference work and client work are different. A skill can help explain a rule. Check its author, review record, applicable year and official sources.
Advice on a specific filing needs a separate engagement. The written engagement names the accountant responsible and the work included; downloading a skill does not arrange that review.

A skill contributor and the accountant engaged for a client can be different people. We confirm availability and responsibility before client work starts.

What approval means here

Every skill is Built from the law. It says Approved by [name] when an approved accountant stands behind it. Otherwise it says Not yet approved.

See the approval label and official sources on each skill.

Why this is the moat, not the friction

It's tempting to treat the human as the slow, expensive part to engineer around. It's the opposite: the credentialed human is the only part a competitor can't clone overnight, and the only thing that makes "we'll handle your tax" a promise rather than a liability. Real accountants standing behind the rules, and available to review what gets filed, is what separates a tax layer from a tax toy.

For a platform, skill access and professional services are separate. An integration can retrieve reference material; an engagement must establish who will handle a particular client’s work.

If you only take one thing from this: an AI can give your users a number. Only a warranted accountant can let them rely on it. Build the second thing, and the first thing becomes safe to ship.

Curious how the verified rules and the accountants behind them fit into a product? Read the three-layer model or explore the platform integration.