How to Respond to an IRS CP05 Notice (Step-by-Step)
Step 1: Read the Notice Carefully
Review the tax year, refund information, and instructions included in the notice.
Step 2: Check Your Tax Return
Verify your income, withholding, credits, and tax documents for accuracy.
Step 3: Keep Your Documents Ready
You may need:
- W-2 forms
- 1099 forms
- Pay stubs
- Tax return copies
Step 4: Monitor Refund Status
The IRS may continue reviewing the return for several weeks or months.
What If the IRS Requests More Information?
If the IRS later asks for documents, respond as quickly as possible to avoid additional delays.
What Happens If You Ignore CP05?
Ignoring IRS follow-up requests can delay your refund further.
Learn more here: What happens if you ignore CP05.
Common Mistakes
- Ignoring IRS letters
- Throwing away tax documents
- Failing to monitor refund status
- Not responding to IRS requests
Bottom Line
The best response to a CP05 notice is to monitor the review process carefully and respond quickly if the IRS requests additional information.
Disclaimer: This content is for informational purposes only.

Editor
25 years of experience managing tax, accounting, payroll, and employment-related information portals. Editor of Accounting Portal since 2011.
Read full bio →
Disclaimer
The information provided on Accounting Portal is for general informational and educational purposes only and does not constitute professional accounting, tax, financial, or legal advice.
While we strive for accuracy and timeliness, no representation or warranty is made regarding completeness or reliability. Always consult a qualified professional before making any business, tax, or financial decisions.
Neither Accounting Portal nor its authors are liable for any loss or damage resulting from the use of this information.
© 2026 Accounting Portal. All rights reserved.
