Most Common Types of IRS Tax Problems

April 20, 2026
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Receiving notification from the Internal Revenue Service that there’s some kind of problem is one of the most bone-chilling situations an American taxpayer can experience. Just receiving an envelope with a return address from the IRS can strike fear. There are many different reasons that the IRS might reach out, but some are more common than others. Here are the top issues that would cause a taxpayer to hear from the IRS or require you to resolve an issue: An Error On Your Tax Return – Nobody’s perfect, and filling out tax returns is not an easy thing. If you’ve made a mistake, whether it’s something simple like filing status or number of dependents or something bigger like total income or incorrectly claiming a deduction, if you discover it on your own, all you need to do is file an amended return using form 1040X, the Amended Individual Income Tax Return. If the mistake means that you owe more money, quickly submitting the amount that you owe will help you avoid having to pay too much in penalties or interest. It’s not at all unusual for the IRS to discover mistakes – especially math mistakes – and they will generally notify you that they have made corrections on your behalf. Mismatched/Underreported Income – Along the lines of the mistakes referenced above, there is a specific form that the IRS will send you if they determine that the amount of income you report on your tax return is different from what has been reported by employers. That form is the CP2000 Notice, and the agency will send it to you, notifying you of the corrected amount, should they review your return and feel that it is appropriate. Failure to File a Tax Return – Filing a tax return isn’t necessarily required if you don’t owe money or if you’re owed a tax refund, but it’s not a good idea. Failing to file a return when you’re owed a refund puts you at risk of losing out on receiving the money you’ve owed – you have just three years to amend the problem if you want to get your money. For those who are in arrears to the IRS, there is a significant negative outcome to failing to file a return, including having to pay a “failure to file” penalty that can go as high as 25 percent of your unpaid tax bill: 5 percent of the amount you owe, plus interest, will be charged for each month for up to five months You Owe the IRS for Taxes Not Paid – When the IRS calculates that you have not paid them the full amount that you owe, they will send you notification of what they believe the difference is via form CP14. You Owe the IRS Penalties and Fees – When you don’t pay your taxes or you fail to file a return, the IRS will notify you that you owe them penalties, and possibly interest. You Owe the IRS But Can’t Afford to Pay – There are many taxpayers who find themselves facing a tax bill that they are simply unable to pay all at once. If you fall into this category, the IRS does offer the option of paying in installments. To request this type of payment plan, contact the agency. If even paying in small increments is outside of your ability, you may be able to negotiate a reduced tax bill through what is called an Offer in Compromise. Tax Debt Resulting in Tax Levy – If you are unable or unwilling to satisfy your tax debt, the IRS may opt for a tax levy, which is the legal seizure of your property in lieu of payment. A tax levy can take the form of real property such as real estate, your vehicle or personal property, or your wages, the money in your bank accounts or your financial accounts. Notification that a levy is being issued against you comes via either notice LT11, CP504, CP90, or CP91. Notification that A Tax Lien Has Been Filed – If you have failed to pay your tax debt, the IRS may take action to protect its own interests ahead of other creditors by filing a tax lien. This comes in the form of Letter 3172, which will be sent to both you and your other creditors to let them know of the government’s claim against your financial assets, personal property and real estate. By sending this letter out, the government ensures that it will benefit from the liquidation of any of your property in order to satisfy the amount that it is owed. Once a lien has been placed on your property, it is extremely difficult to get out of until you’ve paid up.

Tax and Financial Insights
by NR CPAs & Business Advisors

Explore practical articles that explain tax strategies, financial considerations, and important topics that may affect your business decisions.

2026 IRS Mileage Rates: Key Updates and Insights

The IRS has rolled out the inflation-adjusted mileage rates for 2026, offering taxpayers an efficient way to claim deductions for vehicle-related expenses incurred for business, charity, medical, or moving purposes. These adjustments reflect the continued economic shifts impacting car operation costs.

Effective January 1, 2026, the new standard mileage rates are established as follows:

  • Business Travel: Increased to 72.5 cents per mile, inclusive of a 35-cent-per-mile depreciation allocation. This marks a rise from the 70 cents per mile rate set for 2025
  • Medical/Moving Purposes: Reduced slightly to 20.5 cents per mile, down from 21 cents in the previous year, reflecting the variable cost considerations.
  • Charitable Contributions: Consistent at 14 cents per mile, a fixed rate unchanged for over a quarter-century.

As is typical, the business mileage rate considers the integral fixed and variable costs of automobile operation. Meanwhile, the medical and moving rates remain contingent on variable expenses as determined by the IRS study.

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It is critical to note that the One Big Beautiful Bill Act (OBBBA) held firm on disallowing moving expense deductions except for specific cases within the Armed Forces and intelligence community, marking a substantial shift since 2017.

When engaging in charitable work, taxpayers might opt for a direct expense deduction over the per-mile method, covering gas and oil costs. However, comprehensive upkeep and insurance costs are non-deductible expenses.

Business Vehicle Use Considerations: Taxpayers can alternatively compute vehicle expenses using actual costs, which might benefit from shifting depreciation rules, particularly through bonuses and first-year advantages. Keep in mind, however, reverting from actual cost calculations to standard rates in subsequent years is restricted, particularly per vehicle protocol and when exceeding four vehicles in concurrent use.

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Additionally, parking, tolls, and property taxes attributable to business can be deducted independently of the general rate, an often-overlooked advantage by many business owners.

Tax Strategies for Employers and Employees: Reimbursements based on the standard mileage framework, providing the right documentation is in place, remain tax-free for employees. Meanwhile, the elimination and continued prohibition of unreimbursed employee deductions continue, with particular exceptions offered to qualified personnel across specific occupations.

Opportunities for Self-employed Individuals: Entrepreneurs remain eligible for deductions on business-related vehicle use via Schedule C, with potential to account for business-use interest on auto loans.

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Heavy SUVs and Deduction Advantages: Heavier vehicles exceeding 6,000 pounds but under 14,000 pounds open opportunities for substantial tax deductions through Section 179 and bonus depreciation avenues. The lifecycle of such a vehicle bears implications on recapturing initially claimed deductions, urging cautious tax planning.

For professional guidance on optimizing your vehicle-related tax deductions and understanding their implications on tax strategies, contact our office in Coral Gables, Florida, where expert advice and strategic insights are just a call away.

Educator's Deduction Reform: Key Changes Under OBBBA

The One Big Beautiful Bill Act (OBBBA) introduces significant enhancements for educators' tax deductions starting in 2026, offering both strategic opportunities and planning considerations for educators who qualify. With the reinstated itemized deduction for qualified unreimbursed expenses, educators have a broader spectrum of financial relief. This is complemented by the retention of the $350 above-the-line deduction, allowing educators to maximize their tax benefits by selectively allocating expenses between these avenues.

Understanding the nuances of these changes is crucial for educators and financial advisors alike. The dual-option deduction strategy can potentially enhance tax efficiency, thereby aligning with broader financial planning goals.

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At NR CPAs & Business Advisors, based in Coral Gables, Florida, our expertise in tax preparation and planning provides invaluable support to educators navigating these changes. Our comprehensive approach, combined with personalized advice from our experienced team, ensures compliance and optimization in line with the latest tax legislations.

Given these updates, it is imperative to engage with seasoned professionals to fully leverage your deduction strategies. Contact us today to streamline your tax planning under OBBBA's new guidelines and maximize your deductions for upcoming tax years.

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