Common tax filing mistakes include simple math errors, incorrect Social Security numbers, misspelled names, choosing the wrong filing status, and failing to sign the return. Other frequent, costly errors are forgetting to report income, entering incorrect bank routing numbers for direct deposit, and missing deadlines.
Avoid These Common Tax Mistakes
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.
Businesses that show losses are more likely to be audited, especially if the losses are recurring. The IRS might suspect that you must be making more money than you're reporting. Otherwise, why would you stay in business? Most likely to be audited are taxpayers reporting small business losses.
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.
The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.
Wages, dividends, bank interest, and other income received and that was reported on an information return should be entered carefully. This includes any information needed to calculated credits and deductions.
Different amount: If the refund isn't the amount you expected, you should receive a notice explaining why. If you don't receive a notice or you believe the IRS changed your refund incorrectly, contact the IRS or order a transcript to find out about any IRS changes.
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5 things to keep in mind before you file your tax returns this...
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.
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.
Does Zelle Report Payments to the IRS: Form 1099-K Details. IRS Form 1099-K reports payments received for goods or services during the tax year from credit, debit, or stored value cards and TPSOs. The 2025 reporting threshold is $2,500 or more, which will be reduced to $600 in 2026.
Landscaping improvements that enhance the value or useful life of a property are typically considered capital improvements rather than deductible expenses. Capital improvements are added to the cost basis of the property and may be depreciated over time, rather than deducted in the year they are incurred.
The IRS doesn't have a specific dollar limit for hobby income; instead, it focuses on profit motive: if you intend to make a profit, it's a business, but if it's for fun, it's a hobby, and you must report all income but can't deduct losses. Key is that you report all hobby income on Form 1040 as "other income," and if net earnings from self-employment are $400 or more, you owe self-employment tax, even if it's a side gig. The main difference from business is that you can't deduct hobby expenses (under current law) and must report all profits.
According to the rule, an expense is incurred and deductible in the tax year if it meets the “all-events test” and the economic performance in question occurs within 8½ months after the close of the tax year. The all-events test is threefold: All events have occurred that establish liability.
Audit evidence is critical for verifying the accuracy of financial statements and supporting auditors' opinions. Different types of audit evidence include physical examination, documentation, observations, inquiries, confirmations, analytical procedures, and reperformance.
5C Analysis is a marketing framework to analyze the environment in which a company operates. It can provide insight into the key drivers of success, as well as the risk exposure to various environmental factors. The 5Cs are Company, Collaborators, Customers, Competitors, and Context.
Five Common Audit Findings and How to Address Them: Insights from Page Kirk