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IRS notice decoder · Notices of deficiency

CP3219N: a notice of deficiency for a return the IRS never got

A CP3219N is a notice of deficiency: the IRS figured your tax from reported income because no return arrived. The Tax Court date matters.

By the Carry Forward Learning team Reviewed by Hunter Nottingham, JD, CPA

Checked Review by

CheckedOct 19, 2026

What a CP3219N means

A CP3219N is a notice of deficiency, the letter that starts the clock for going to Tax Court. The IRS sent it because it didn't receive your return, and it figured a proposed tax, penalty and interest from income others reported to it. source 1

This is the notice that opens the door to the U.S. Tax Court. The IRS page gives a set number of days from the date on the notice to petition the court, and a longer window if you live outside the country. source 1

We read the IRS figure as a starting point, not a final answer. It was built without your deductions and expenses, so a real return usually tells a different story. source 1

The date that counts

The IRS page gives a set number of days from the date on the notice to petition the Tax Court, longer if you live outside the country, and says filing a return doesn't extend that deadline. If you disagree, the IRS asks you to file your return by the date shown on the notice. source 1

For context, the IRS page and section 6213 of the Code give 90 days from the date of the notice, or 150 days for someone outside the country. The date printed on your notice is the one to go by. source 1 source 2

Why people get one

  • No return for that year reached the IRS.
  • The IRS has wage and income reports for you, such as Forms W-2 and 1099, for a year without a return.

First steps

  1. Check your IRS online account (typed in yourself at irs.gov) to see the notice and confirm it's real.
  2. Find the date on the notice and work out the Tax Court deadline the IRS page describes. Filing a return does not extend it. source 1
  3. If you agree, sign and return the response form at the end of the notice, and pay or look at payment options. source 1
  4. If you disagree, file your return by the date shown on the notice, using the income listed in it plus any other income you had, and claim the deductions you're entitled to. source 1
  5. If you want to challenge the determination, petition the Tax Court, online through its DAWSON system or by mail with a copy of the notice. source 1
  6. If you think you don't have to file at all, call the number printed on the notice. source 1

What not to do

  • Don't assume filing a return protects your Tax Court rights. The IRS says it doesn't extend the deadline. source 1
  • Don't accept the IRS figure without checking it. It was built only from reported income.
  • Don't let the notice sit. The IRS says there's no extra time to file, and a late return may be processed much more slowly. source 1
  • Don't act on a link or phone number from an unexpected email or text that claims to be about this notice. Use irs.gov, typed in yourself.
  • Related CP518 The final reminder to file a missing return.
  • Related CP3219A The notice of deficiency for a return that was filed, often after a CP2000.

Keep reading

Questions

Does filing my return extend the Tax Court deadline on a CP3219N?

No. The IRS says filing a return doesn't extend the deadline to petition the Tax Court. source 1

Where do I send my late return?

The IRS says recent tax periods may be e-filed; otherwise mail the response form, the return and the notice in the envelope provided. source 1

I disagree but don't want to go to Tax Court. What now?

The IRS says to call the number on the notice with your paperwork ready. source 1

Can I get more time to file?

No. The IRS says it will accept a late return, but processing may be significantly delayed if it arrives after the Tax Court window. source 1

Sources

  1. IRS, Understanding your CP3219N notice (updated July 20, 2026) (external site) checked Oct 19, 2026
  2. 26 U.S.C. section 6213 (deficiency procedures; math and clerical errors) (external site) checked Oct 19, 2026

Every rule on this page comes from the IRS page in the list, read on the date shown. Your notice itself is the final word on its own dates and amounts.

Figures on this page

Checked

Every figure above comes from the source listed here, with the date we checked it and the date it is due for a re-check.

  • IRS procedure: tax court petition days cf-2026:irs_procedure.tax_court_petition_days
    IRC 6213(a) checked 2026-10-19, review by 2027-01-19