2026 guide

AI for Tax Preparers

Draft the client letter, explain the position, and find the question you should have asked — before the return is filed.

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No credit card · ChatGPT, Claude, Gemini, Grok and Perplexity in one place

What MultipleChat does that one AI cannot.

You already do half of this by hand: ask one model, paste the answer into another to check it. Here is what that turned up on a real task for tax preparers.

You asked

Can the client take this deduction, and how do I document it?

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The threshold it applied changed this year; the fact check flagged it and attached the current figure.

The models disagreed

One model said the deduction clearly applies.

Another said it survives only if the documentation shows business purpose at the time of the expense, not after.

The second answer is the one that matters if the return is ever examined.

How the checking works

What AI does for tax preparers

Use case 1

Explain a position to the client in writing

The rationale, at a length the client will read, ready for the file.

Try this prompt

Explain this tax position to a client with no tax background: [describe]. Give me a two-sentence version for the email and a fuller version for the file that names the assumptions the position depends on.
Use case 2

Find the questions you have not asked

Ask the models what is missing from the organiser, not what is in it.

Try this prompt

Here is a summary of a client's situation: [paste]. What information am I missing that could change the outcome? List the questions in order of how much they could move the number, and say what each one would change.
Use case 3

Stress-test the position before you file

Have a model argue the examiner's side.

Try this prompt

Here is the position I plan to take and my reasoning: [paste]. Argue it the way an examiner would. Where is the weakest link? What documentation would I want in the file if this is questioned in two years?
Use case 4

Turn the engagement into a clean summary

What was done, what was assumed, what was relied on.

Try this prompt

From these notes, write a file memo: the facts relied on, the treatment chosen, the alternatives considered and rejected with reasons, and the documentation the client provided. Neutral tone, suitable for a working paper.

How to start in the next 10 minutes

1

Open MultipleChat and turn on AI Collaboration.

2

Describe the situation with figures but without identifying details.

3

Read the Disagreements list — a split between models usually marks a genuinely arguable position.

4

Verify every threshold, rate and deadline against a current source before filing.

What you might be worried about

It quoted a rule that changed

It will, often. Thresholds, phase-outs and deadlines move every year and a model's training does not. Everything with a number in it goes through the fact check, and anything unsupported is flagged rather than passed on.

Can I put client figures in?

On paid plans nothing you enter trains a model and the providers do not retain it. Use initials and figures; the analysis does not need the name.

Does this replace professional judgement?

No, and the page is not pretending otherwise. It drafts, it argues the other side, and it tells you which claims it could not support. You sign the return.

FAQ for tax preparers

Can it prepare the return?

No. It helps you research, explain, document and pressure-test. Preparation and filing stay in your software and with you.

Is it current on this year's numbers?

Assume not. That is the single most important habit with AI in tax work — treat every figure as unverified until the check attaches a source.

Can it read a prior-year return?

Yes. Upload it and ask what changed, what looks inconsistent, and what you would want to ask the client about.

Will it help with client education?

It is excellent at it. Explaining the same position at three different levels of detail takes seconds and saves a long call.

Ready to try AI for your work?

MultipleChat gives tax preparers ChatGPT, Claude, Gemini, Grok and Perplexity in one workspace — and has them check each other before you use the answer.

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Also see: Free AI tools · AI glossary · AI for other professions

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