IRS Notice LT16: Overdue taxes or missing returns
Quick answerThe IRS is trying to collect unpaid tax and/or is missing returns from you, and may take enforcement action if you don't respond.
Letter / noticeLT16
MeaningOverdue taxes or missing returns
Action needed?Yes — see steps
What happens next
Respond by the date on the notice.
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What you should do
- File any missing returns
- Pay or set up a payment plan
- Call the number on the notice
Official explanation: IRS page for LT16
Scam check: the IRS first contacts you by mail. Use only the phone numbers printed on your letter or on IRS.gov — never ones from a text, email or unofficial site.
Frequently asked questions
What does IRS Notice LT16 mean?
The IRS is trying to collect unpaid tax and/or is missing returns from you, and may take enforcement action if you don't respond.
What should I do?
File any missing returns Pay or set up a payment plan Call the number on the notice
How long does it take?
Respond by the date on the notice.
Sources
- IRS: Understanding your IRS notice or letter
- IRS: Get Transcript
- Taxpayer Advocate Service (independent help inside the IRS)
Written by the editorial team and checked against the official sources above. See our editorial policy.
By the TranscriptCodes Editorial Team · Last reviewed 2026-11-12.