

As taxpayers prepare to file their 2025 tax returns, misinformation about federal income taxes persists, despite recent legislative updates. The One Big Beautiful Bill reshaped parts of the tax system, but many long-standing rules remain unchanged, leaving room for misunderstanding as the filing season begins. Tax professionals say relying on outdated assumptions can increase tax liability, delay tax refunds, or cause taxpayers to miss available tax credits under current tax laws.
Several persistent tax myths continue to mislead filers, particularly regarding how income is taxed and how filing deadlines are determined. One common misunderstanding involves tax brackets. Moving into a higher bracket does not increase taxes on all income. The progressive tax system applies higher rates only to income above each threshold, while earlier income remains taxed at lower rates based on adjusted gross income.
Another frequent error involves tax extensions. Filing Form 4868 provides an extension of time to file, not an extension of time to pay. Any unpaid balance after the tax filing deadline may result in interest and a failure-to-file penalty, even if the return is submitted later.
Some taxpayers incorrectly believe income is taxable only if a Form 1099 is received. In reality, all taxable income must be reported. The IRS compares reported income with third-party records, meaning discrepancies can trigger notices and tax penalties.
Tax refunds are another area where misconceptions persist. A large refund does not necessarily mean a tax return was filed correctly. In most cases, refunds reflect excess withholding as indicated on Form W-4. Adjusting withholding using the IRS Tax Withholding Estimator can help align payments with actual tax liability.
Self-employed taxpayers and small businesses often misunderstand deduction rules. Home office deductions and other business expenses must be ordinary, necessary, and adequately documented to be eligible for tax deductions. Personal expenses, commuting costs, and unsupported claims do not qualify and may increase audit risk.
Recordkeeping is also frequently misunderstood. The IRS generally has three years to audit a return and up to six years if income is substantially underreported. Taxpayers should retain records accordingly, especially when claiming deductions or tax credits.
Some assumptions related to recent law changes are partially accurate but commonly misapplied. Under OBBB provisions effective from 2025 through 2028, eligible seniors may claim an additional standard deduction on top of the regular amount. While this method can reduce taxable income, it does not eliminate filing requirements or taxes owed.
Another persistent myth is that tax planning only matters at year-end. Decisions involving retirement plan contributions, capital gains, quarterly estimated tax payments, and Social Security benefits can significantly impact tax outcomes throughout the year. Waiting until December limits available options.
With OBBB changes now in effect, misinformation poses a greater risk for taxpayers in 2025. Filing status choices, eligibility for credits such as the Child Tax Credit or Earned Income Tax Credit, and accurate withholding all depend on applying current rules correctly.
Taxpayers who experienced major life changes, income shifts, or changes in employment may benefit from reviewing their withholding and consulting a qualified tax professional. Addressing errors early can help avoid penalties, delays, and unexpected balances due.
By William Mc Lee, Editor-in-Chief & Tax Expert—Get Tax Relief Now