The short answer: use an AI assistant for what it's good at, explaining and organizing, and use free tax software for what it isn't, the math and the filing. Done that way, filing with AI costs nothing and is safer than either one alone.
AI assistants like ChatGPT, Claude and Gemini can make tax season a lot less painful. But even the best models still get a meaningful share of returns wrong in public tests, and none of them can file a return for you. This guide walks through a setup that gets the benefits without the risks, with example prompts you can copy.
What you'll need
- An AI assistant you already use (a free account is fine)
- Your tax forms as they arrive: W-2s, 1099s, 1098s and so on
- Last year's return, if you have it
- A free way to file (options below)
Step 1: Ask AI to map out your tax year
Before any forms arrive, tell the assistant about your year in general terms. You don't need names, Social Security numbers or account numbers for this.
Prompt you can copy:
I'm filing my 2026 federal taxes. In 2026 I worked one full-time job, drove for a delivery app on weekends, got married in June, and paid interest on a car loan for a new car. Which tax forms should I expect to receive, and which deductions or credits should I look into? Please flag anything that changed for 2026.
A good assistant will give you a list: a W-2 from your job, possibly a 1099-NEC or 1099-K from the app, your lender's interest statement, and pointers to things like the car loan interest deduction and the choice between filing jointly or separately.
Check what it says about 2026 changes. Tax law changed a lot for 2026. If the assistant doesn't mention the new deductions for tips, overtime, seniors and car loans, its information may be out of date. Our 2026 changes guide has the full list.
Step 2: Gather your forms
Forms arrive in January and February. Turn the assistant's list into a checklist and tick each one off as it comes in. Navo's checklist covers the common ones.
When a form confuses you, ask about it by box rather than uploading the whole thing:
What does box 12 code DD on my W-2 mean? Does it affect my taxes?
My 1099-K from a payment app includes money friends paid me back for dinners. How do I handle that?
What to keep out of the chat
A W-2 shows your full Social Security number. A 1099 may show account numbers. Before you share a whole form with a general-purpose assistant, check how that service stores your chats and whether it uses them for training. Never share:
- Your full Social Security number, or your family's
- Bank account and routing numbers
- Your IRS Identity Protection PIN
More in Is it safe to give an AI your tax documents?
Step 3: Let tax software do the math
This is the step not to skip. In the latest public test of AI tax math, the best model got about four returns in five exactly right when it could search the web, and fewer than half without search. A return that's mostly right is still wrong, and the IRS checks the math. Read what the tests found.
So don't copy numbers from a chat into your return. Use software that calculates the return from the IRS's rules, the same way every time. Free options include:
| Option | Who it's for | Cost |
|---|---|---|
| Navo | Anyone. No income limit. | Free for the 2027 season |
| IRS Free File | People under the IRS's income limit | Free federal through IRS partner companies; some include a state return |
| Free File Fillable Forms | People comfortable filling in forms line by line | Free at any income; no state returns |
| VITA and TCE | People with lower incomes, disabilities, limited English, or age 60 and up | Free, prepared in person by IRS-certified volunteers |
With Navo, in Ohio and the nine states with no income tax, Navo files your whole return. Everywhere else, Navo files your federal return and you file your state return with your state.
Compare all the free ways to file
Step 4: Use AI to double-check the result
Once your return is prepared, an assistant makes a good second reader. Ask it to explain anything that surprised you:
My refund is $800 smaller than last year even though my pay was about the same. My filing status changed from single to married filing jointly, and my spouse also works. What could explain the difference?
Here are the main totals from my return: wages, adjusted gross income, standard deduction, taxable income, total tax, and withholding. Does anything look unusual for someone with one W-2 job?
Treat the answer as a second opinion. If it points to something that looks wrong, check it in the software, which shows how each number was figured. Don't change a number just because a chatbot suggested it.
Step 5: Review, sign and file
Read through your return before you sign. Check your name, Social Security number and bank details carefully, because a typo in any of them can get a return rejected or send a refund to the wrong account.
Choose direct deposit, which is the fastest way to get your refund.
Mistakes to avoid
- Filing a return a chatbot calculated. If you file by hand on paper or Fillable Forms, you're responsible for every number. Use software that does the math.
- Trusting an assistant's dollar figures. Limits and thresholds change every year. Ask for the source and check it on irs.gov.
- Missing a form. If the assistant's checklist leaves something out, the IRS still gets a copy of that form. Compare against last year's return too.
- Paying for something you didn't need. Many "free" products charge for common situations or for the state return. Check before you start.
Coming soon: Navo inside your AI assistant
We're building a way to start your Navo return from inside Claude. You'll be able to hand the assistant your documents and answer its questions in plain language. Navo does the math, you enter your most sensitive details on Navo, and you review, sign and file on Navo. Learn more
Frequently asked questions
Is it really free? Using a free AI account costs nothing, and the filing options above are free for the people they cover. Filing with Navo is free for the 2027 season.
Can I just ask ChatGPT to fill out my 1040? You can, but you'd then have to type every line into a form yourself and trust its math. Tax software is free for most people and does the math for you.
Is AI better than a human preparer? For explaining your forms, an assistant is quick and available any time. For complicated situations, like a business with employees or a large inheritance, a qualified tax professional is still worth it.
Related guides
- Can ChatGPT, Claude or Gemini do your taxes?
- Why Navo never lets AI do the math
- Is it safe to give an AI your tax documents?
This post is general information, not tax advice for your situation. Sources: IRS Free File; IRS, Free tax return preparation for qualifying taxpayers (VITA and TCE); TaxCalcBench.