Tax inspectors review tax returns and financial records to ensure accuracy, compliance with laws, and that the correct amount of tax is paid. They specifically look for inconsistencies, such as low income reported against high turnover, unsubstantiated deductions, missing receipts, and signs of potential tax evasion, including manipulated accounts.
The inspector examines the structural aspects of the home, heating and cooling systems, plumbing, electrical work, water and sewage to ensure they are all functioning properly. The overall condition of the property is also assessed for fire and safety issues, damages and anything else that can affect its value.
The IRS audit is simply conducting an impartial review of your tax return to determine its accuracy. You will be expected to demonstrate that you've reported all your income and were eligible to take all the credits, deductions and exemptions shown on your return. There is also a timeframe involved.
Check the preparer's qualifications.
New regulations require all paid tax return preparers to have a Preparer Tax Identification Number. In addition to making sure they have a PTIN, ask if the preparer is affiliated with a professional organization and attends continuing education classes.
Red flags of a bad tax preparer include promising large refunds, refusing to sign the return (ghost preparer), asking you to sign a blank form, basing fees on your refund amount, directing refunds to their account, being hard to contact, or suggesting fake deductions/businesses; legitimate preparers sign returns, ask for full financial info, provide copies, and have credentials.
The IRS uses a combination of automated and human processes to select which tax returns to audit. Not reporting all of your income is an easy-to-avoid red flag that can lead to an audit. Taking excessive business tax deductions and mixing business and personal expenses can lead to an audit.
What Not to Say During an Audit?
Here are 12 IRS audit triggers to be aware of:
Major issues with the HVAC system, furnace, water heater or other appliances are other common red flags that show up during inspections. For a better idea of what your home inspector should be looking for, take a look at this buyer home inspection checklist used by the U.S Department of Housing and Urban Development.
Top 10 Reasons Vehicles Fail Inspection:
Who is Liable – the Tax Payer or the Tax Preparer? Even if your preparer commits an egregious error or engages in fraudulent activity, you generally remain liable for paying any additional tax, interest, and civil penalties the IRS or the California Franchise Tax Board (FTB) assesses.
There are five potential threats to auditor independence: self-interest, self-review, advocacy, familiarity, and intimidation. Any lack of independence compromises the integrity of financial markets.
Evaluates the overall presentation, structure and content of the financial statements, including the disclosures, and whether the financial statements represent the underlying transactions and events in a manner that achieves fair presentation (i.e gives a true and fair view).
Most taxpayers will do anything they can to avoid tax audits. Filling out an accurate tax return is the best way to avoid an audit. Additionally, you should ensure you double-check your math and only claim legitimate tax deductions. E-filing may also be helpful.
Which Taxpayers the IRS Audits Most Often. Oddly, people who make less than $25,000 have a relatively high audit rate. This higher rate is because many of these taxpayers claim the earned income tax credit, and the IRS conducts many audits to ensure that the credit isn't being claimed fraudulently.
If the deductions, losses, or credits on your return are disproportionately large compared with your income, the IRS may want to take a second look at your return. Taking a big loss from the sale of rental property or other investments can also spike the IRS's curiosity.
The 5 Cs of audit (Criteria, Condition, Cause, Consequence, Corrective Action) are a framework for structuring clear, actionable audit findings, explaining what should be (Criteria), what is found (Condition), why it happened (Cause), what the impact is (Consequence/Effect), and how to fix it (Corrective Action/Recommendation) to drive organizational improvement and compliance.
You generally need to file a U.S. federal tax return if your gross income for Tax Year 2025 (filed in 2026) is above a certain threshold, which varies by filing status and age, for instance, $15,750 for single filers under 65, while self-employed individuals must file if they earn $400 or more in net earnings. Thresholds increase for married couples and those 65 or older, but you might still need to file to claim a refund or refundable credits even if below the income limit.
The "20k rule" refers to the traditional IRS threshold for reporting income from payment apps and online marketplaces on Form 1099-K: over $20,000 in gross payments AND more than 200 transactions in a calendar year. While a law (the American Rescue Plan) temporarily lowered the threshold to $600, recent legislation, the One Big Beautiful Bill Act (OBBBA) (OBBBA), has reinstated the $20,000/200-transaction rule for tax years starting in 2025, providing relief for casual sellers and gig workers.
The IRS does not actively monitor every Venmo account 1-(855)(518)(9622). However, Venmo may report certain transactions to the IRS if they meet federal reporting requirements 1-(855)(518)(9622). This typically applies to income-related payments, not casual personal transfers 1-(855)(518)(9622).