AI for tax help: what's smart, what's risky

Tax season turns simple questions into hours of confusion. ChatGPT, Claude, and Gemini are genuinely useful as a first stop for understanding what something means or what to ask. But AI is also confidently wrong about tax specifics often enough that you should never trust it for the actual return. Here's how to get the upside without the risk.

What AI is genuinely useful for

Explaining tax terms in plain English

• "Explain what 'Schedule C' is to someone who has never filed business taxes."
• "What's the difference between a traditional IRA and a Roth IRA in terms of taxes?"
• "What does 'capital gains' mean and when do I pay it?"
• "Explain a 1099 vs a W-2 in plain language."

Decoding IRS letters and notices

The IRS sends letters that look terrifying but often aren't. Take a photo (after covering your SSN), upload to ChatGPT or Claude, and ask:

"What is this IRS letter asking me to do? What is the deadline? What's the worst case if I do nothing? Should I be worried?"

AI translates IRS-speak well. Then verify any action on the IRS website or with a CPA.

Listing documents to gather

"I'm a retired person with Social Security, a small pension, and one rental property. What documents do I need to gather before filing my 2025 taxes?"

AI gives a solid checklist. Better than guessing.

Brainstorming possible deductions

"I'm a freelance graphic designer working from home. What business deductions are commonly available that I might be missing?"

AI gives a starting list. Then verify each one with your CPA or IRS publications before claiming.

Preparing questions for your CPA

Before a tax appointment:

"I'm meeting with my CPA next week. My situation this year: [briefly describe]. What questions should I make sure to ask?"

You walk in prepared, the appointment is more productive, and you don't forget the things you wanted to discuss.

Understanding a confusing tax situation

• "I sold a house I lived in for 25 years. How do taxes work on that?"
• "I started a side business this year and made about $4,000. What are my tax obligations?"
• "I'm 73 and have to take RMDs from my retirement accounts. How does that work?"
• "My spouse passed away last year. How does our tax filing change?"

AI gives you the general shape of the situation. You then verify and file with a real tool or person.

What AI is bad at for taxes

Specific calculations

Tax brackets, AGI calculations, specific dollar thresholds. The rules change each year. AI's training data may be a year old. Always check the current IRS publication.

State-specific tax rules

State tax law varies wildly. California, Massachusetts, and New York have unique rules. AI gets state details wrong often.

Current deadlines and form numbers

"When is the deadline for [form] this year?" AI may give you last year's deadline. Always verify at irs.gov.

Edge cases and unusual situations

If your situation is uncommon (foreign income, multi-state residency, large inheritance, business sale), AI will give you confident answers that may be wrong. Get a CPA.

Actual filing

AI cannot fill out and submit tax forms for you. You still need tax software or a preparer to file.

Privacy: what to share, what not to share

OK to share with AI

• General income ranges ("I make around $80,000 a year")
• Your state (or at least region) for state-specific questions
• Your filing status (single, married, head of household)
• Types of income (W-2, 1099, rental, retirement)
• The text of an IRS letter (with your SSN and address blacked out)
• A specific scenario described generally

Never share with AI

• Your full Social Security Number
• Your full bank or brokerage account numbers
• Your full tax return as filed
• Photos of W-2s, 1099s, or tax forms with identifying info visible
• Your full address combined with full birthday

Better AI tools for tax-related questions

• Perplexity: better for "current IRS deadline" type questions because it searches the web and cites sources. See our Perplexity guide.
• TurboTax's built-in AI assistant: if you're using TurboTax, the in-app AI knows the current year's rules and is grounded in real tax law. Better for filing questions than ChatGPT.
• H&R Block's AI Tax Assist: similar idea, built into their software.
• IRS.gov: for verifying anything AI tells you. The IRS website has actual official answers.

When to skip AI entirely and call a CPA

• You started or sold a business
• You sold a house with a big gain or your primary residence
• You inherited a large amount
• You're navigating a divorce that affects taxes
• You moved between states during the year
• You have foreign income or accounts
• You got an audit notice
• You owe more than $10,000 and aren't sure why
• You're 70+ and dealing with RMDs and Social Security taxation for the first time

Useful AI prompts for tax season

Right before tax appointment

"I'm meeting with my CPA on Friday. I'm a retired teacher with Social Security ($28,000), a small pension ($12,000), and 401k withdrawals ($30,000). I own one rental property that brought in $24,000 last year. What questions should I ask? What documents should I bring? What might I be missing?"

Decoding a notice

"I got this letter from the IRS [paste text, SSN removed]. Explain what they're asking for, my deadline, and what could happen if I don't respond. Suggest exactly what I should do next."

Understanding an option

"I have $50,000 in a traditional IRA and I'm wondering if I should do a Roth conversion this year. Explain the basics of how that works, the pros and cons in my situation [I'm 64, retiring next year, currently in 22% bracket], and what questions I should ask my financial advisor."

After getting tax software started

"I'm using TurboTax. It's asking me whether I want to claim the standard deduction or itemize. Here are my potential itemized deductions: [list]. Help me think through which is better for my situation."

The bottom line

AI is a fantastic first stop for understanding your tax situation, decoding scary letters, and preparing for appointments. It is a terrible last stop. Always verify with the IRS, tax software, or a real professional before you file or pay or claim. The cost of getting taxes wrong (penalties, interest, audits) is too high to trust AI alone.