IRS NOTICE REFERENCE
Understanding your CP81 notice
We received payments or other credits for the tax return shown on your notice, but we haven’t received your tax return for that year. The period for claiming a refund or credit for that tax year may expire soon.
General information only. Not legal or tax advice.
Notice details
- Notice code
- CP81
- Category
- Filing and non-filer
- Severity tier
- Tier 2 — Action or response expected. The IRS has taken or proposed an action and expects a response or payment.
- Governing law
- §6651; §6012 (Internal Revenue Code sections)
- Source
- IRS.gov — Understanding Your IRS Notice
What this notice is
We received payments or other credits for the tax return shown on your notice, but we haven’t received your tax return for that year. The period for claiming a refund or credit for that tax year may expire soon.
Source: IRS.gov. Reproduced for reference. General information — not legal or tax advice.
What the IRS says to do
If youneed to file this tax return, file immediately. We’ll use the credit amount shown on the notice to pay any taxes you owe and refund any extra. If you’ve already filed this return and it's been over 8 weeks, send us a newly signed copy, including all schedules, forms and other documents you included with your original return. If you want the credit moved to another tax form, tax period or tax identification number, call us at the number on your notice. If you don’t file your tax return or contact us, you’ll lose your credit. The law sets strict time limits for refunding or transferring credits.
This is the IRS’s own guidance reproduced from the IRS notice page. It describes the IRS’s process — it is not legal or tax advice from TaxRiskOS.
Governing IRS procedure (Internal Revenue Manual)
The IRS’s own internal procedures for handling this notice type are documented in the Internal Revenue Manual:
- IRM 5.1.11 — 5.1.11 Delinquent Return Investigations
- IRM 5.18.1 — 5.18.1 Automated Substitute for Return (ASFR) Program
- IRM 4.12.1 — 4.12.1 Nonfiled Returns
Reference to published IRS procedure. General information — not legal or tax advice.
Official IRS reference
Read the official notice page on IRS.gov: https://www.irs.gov/individuals/understanding-your-cp81-notice
Related tools
TaxRiskOS is workflow software for practitioners — it captures the notice, computes the deadline, surfaces the escalation tier, and builds a document checklist. It documents process; it does not give advice or draft responses.
Check this notice’s deadline (free tool)