Let’s find a tax preparation office for you


Oh no! We may not fully support the browser or device software you are using!

To experience our site in the best way possible, please update your browser or device software, or move over to another browser.


What is an IRS Notice of Tax Deficiency?

JH Tax Pro
Jackson Hewitt Copywriter Published On May 22, 2019


Deficiency is a common issue associated with tax returns. A tax deficiency occurs when there’s a difference in the amount of tax you report on your return and the amount the IRS calculates you owe – and the IRS will inform you of this discrepancy with a notice.

A tax deficiency can easily throw a wrench into your finances, but there are some simple steps you can take to resolve it. 

What Triggers a Notice of Tax Deficiency?

A tax deficiency is usually identified when IRS computers compare the documents they received with the tax return submitted for the taxpayer. This includes the information obtained from employers, banks, and other businesses. When the tax you owe on your income – as determined by the IRS using information reported by these third parties – is higher than what you reported on your return, there’s a tax deficiency.

For instance, let’s say you’ve forgotten to include some income, but your employer submitted a W-2 for it - that’s a deficiency.

How to Respond to a Tax Deficiency Notice

A notice of deficiency is a CP3219N or a 90-day letter. The notice will detail the discrepancies that have been documented, and you have 90 days to respond. It is important to act quickly if you have received a tax deficiency notice because the IRS can include court charges in the balance you owe, and interest and penalties continue to accrue. If you agree with the notice, you must sign the included form and send it back. There is no need to file an amended return. If you disagree, you can contest it. For this, you will have to get back to the IRS with an explanation and contact the third party (bank, employer, etc.) to correct any incorrectly reported income.

Are There Penalties if I Don’t Respond?

Failing to pay taxes on time can result in tax liens on your bank accounts or wages. In the worst case scenario, the IRS can seize your property and other assets. If a criminal investigation is initiated, it can also lead to jail time.

While that sounds dire, most tax discrepancies occur as the results of honest errors by a taxpayer, and can be resolved in short order. If the tax deficiency occurred as a result of identity theft or fraud, you will not be liable for paying tax on income you did not earn, like if someone works at a job and earns an income by using your name and Social Security number. If you suspect identity theft, report it to the IRS immediately.

Being aware of the nuances of tax notices and the right way to handle them can save you valuable time and money.

Why Jackson Hewitt®?


We do the work so you don't have to worry. Open late and weekends, no appointment necessary.


We're not tax machines. We're Tax Pros who are happy to answer all of your questions.


We'll dig deep to get you 100% Accuracy. Maximum Refund Guaranteed.