TurboTax calculates your taxes correctly most of the time, but it makes mistakes when your situation is unusual or when you enter information wrong

TurboTax uses the same tax code the IRS uses, so the math itself is sound. The software walks you through questions, fills in forms, and does arithmetic without error. But accuracy depends on what you tell it. If you enter your W-2 income wrong, claim a deduction you don't may have access to for, or miss reporting a source of income, TurboTax will calculate tax on bad information — and produce a wrong return.

The bigger risk is that TurboTax may not ask you about something you need to report. The software is built around common situations: W-2 wages, standard deductions, a few straightforward credits. If you have rental income, a side business, stock sales, or a life change like divorce or inheritance, TurboTax may skip questions that matter, or ask them in a way that doesn't fit your actual circumstances.

TurboTax also has a history of hiding features behind higher-priced versions. The free version may not include deductions or credits you're may have access to to, not because the software can't calculate them, but because Intuit moved them to a paid tier. This is a business decision, not an accuracy problem — but it means you may pay more tax than you owe if you use the free version when a paid version would catch something.

Key Takeaways

  • TurboTax's math is accurate, but only if you enter correct information and report all your income sources.
  • The software may not ask about deductions or credits that apply to your situation, especially if your taxes are complex.
  • The free version of TurboTax excludes some deductions and credits that paid versions include, which can result in paying more tax than necessary.
  • You should review your return yourself before filing, checking that all income is reported and that deductions match your actual expenses and life situation.
  • If your taxes involve self-employment income, investments, rental property, or major life changes, consider having a tax professional review your return or prepare it instead.

When TurboTax gets it right

TurboTax is reliable for straightforward returns. If you have a W-2 job, take the standard deduction, and have no other income, the software will calculate your tax correctly. It imports W-2 data directly from employers in many cases, reducing the chance of typing errors. It catches common mistakes like claiming the same dependent twice or entering a Social Security number in the wrong format.

The software also stays current with tax law changes each year. Intuit updates TurboTax annually to reflect new tax brackets, credit amounts, and rule changes. If you use the current year's version, the underlying tax code is correct.

Common situations where TurboTax falls short

TurboTax struggles when your life or income doesn't fit the standard template. If you are self-employed, the software asks basic questions about business income and expenses, but it may not catch that you're missing deductions or that you should be using a different accounting method. If you have rental property, investment income, or a side business alongside a W-2 job, TurboTax may not ask follow-up questions that reveal whether you owe self-employment tax or may have access to for certain business deductions.

Major life changes are another weak spot. If you got married, divorced, or had a significant change in income during the year, TurboTax's interview may not explore the tax consequences fully. For example, if you sold a house, the software asks whether you had a gain, but it may not ask about improvements you made that reduce the gain, or whether you lived in the house long enough to claim the exclusion.

TurboTax also does not flag situations where you might owe estimated tax next year, or where you should adjust your W-4 withholding. It calculates what you owe this year, but it doesn't advise you on planning ahead.

What to check yourself before you file

Before you submit your return, review it for completeness. Print or download the full return, not just the summary. Check that every W-2, 1099, and other income document you received is reported. Look at the deductions section and ask yourself whether you actually incurred those expenses or claimed those credits. If you took the standard deduction, make sure you didn't also claim itemized deductions by accident.

Verify that your personal information — name, Social Security number, address — is correct. Check that dependents are listed with the right Social Security numbers and relationships. These details matter for matching your return to IRS records.

If your return includes anything unusual — a loss, a large deduction, income from multiple sources — read the line-by-line explanation that TurboTax provides. If you don't understand why a number is there, look it up or ask someone who does before filing.

The free version versus paid versions

TurboTax Free Edition is free only if your taxes are simple. Intuit defines "simple" narrowly: W-2 income, standard deduction, basic credits. If you have self-employment income, rental income, investment income, or itemize deductions, you don't may have access to for the free version, and TurboTax will tell you to upgrade.

The paid versions — TurboTax Deluxe, Premier, and Self-Employed — include more deductions, credits, and forms. Deluxe adds itemized deductions and education credits. Premier adds rental property and investment income. Self-Employed adds business income and self-employment tax. If you use the free version when you should use a paid version, you may miss deductions or credits that would lower your tax bill.

Before you buy, check whether you actually need the features in a paid version. If you have a W-2 job and no other income, the free version is sufficient. If you have a side business or rental income, you need at least Deluxe or Premier.

When to use a tax professional instead

If your taxes involve self-employment income, rental property, significant investment income, or a major life change like divorce or inheritance, consider having a tax professional prepare your return or review it after you've prepared it. A CPA or tax preparer can spot deductions and strategies that TurboTax doesn't ask about, and they can advise you on tax planning for next year.

A professional review costs money — typically $150 to $500 depending on complexity — but it can save you more than that in taxes you would otherwise miss or mistakes you would otherwise make. If your return is complex, the cost is worth it.

Frequently Asked Questions

Will TurboTax get me audited?

TurboTax itself doesn't trigger audits. The IRS audits based on the information in your return, not on which software you used to prepare it. If you claim deductions you don't may have access to for or report income incorrectly, an audit is more likely — but that's a problem with what you reported, not with TurboTax.

Can TurboTax import my information from last year?

Yes. TurboTax can import your prior-year return if you prepared it with TurboTax. It will pre-fill your personal information and some income and deduction amounts. You still need to review everything and update it for changes in your situation or income.

What if I make a mistake after I file?

If you discover an error after filing, you can file an amended return using Form 1040-X. TurboTax has a feature to prepare amended returns. You have three years from the original due date to file an amendment and claim a refund, or to correct an underpayment.

Does TurboTax handle state taxes accurately?

TurboTax includes state tax preparation for most states, and it uses the same approach as the federal return: it asks questions and calculates based on your answers. State tax rules vary widely, so accuracy depends on whether you report all income and deductions that your state requires. Some states have different rules than the federal government, and TurboTax should account for that — but review your state return the same way you review your federal return.

Is TurboTax better than other tax software?

TurboTax, H&R Block, and TaxAct all use the same underlying tax code and produce similarly accurate results for straightforward returns. The differences are in user interface, customer support, and which features are included in each price tier. If you've used TurboTax before and are comfortable with it, switching to another software won't improve accuracy — it will just change the experience.