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In the IRS’s own words · not reviewed by VALID
CP08 notice explained, in the IRS’s own words
This notice says you may be eligible for the Additional Child Tax Credit and entitled to a refund.
Read the full CP08 page on irs.gov ↗
What this notice is about
This notice says you may be eligible for the Additional Child Tax Credit and entitled to a refund.
What you need to do
- Read your CP08 notice carefully.
- Tax year 2025: Complete Form 15110 PDF, Additional Child Tax Credit Worksheet. If the worksheet confirms you have at least one qualifying child complete Schedule 8812, Credits for Qualifying Children and Other Dependents.
- Tax year 2024: Complete Form 15110 PDF, Additional Child Tax Credit Worksheet. If the worksheet confirms you have at least one qualifying child complete Schedule 8812, Credits for Qualifying Children and Other Dependents PDF.
- Send us your completed Form 15110 and Schedule 8812 within 30 days from the date of your CP08 by either:
- Mailing using the envelope provided or
- Electronically using the Documentation Upload Tool by entering the access code on your notice.
Frequently asked questions
I want to mail my completed Form 15110 and Schedule 8812, but I lost my return envelope. (updated Oct. 25, 2023)
You can use any envelope to mail for Form 15110 and Schedule 8812 to the address listed on the top left corner of your CP08 notice. If you send it to a different IRS address, there could be delays in processing your information.
What is the difference between the Child Tax Credit and the Additional Child Tax Credit? Can I qualify for both? (updated Oct. 17, 2024)
The Child Tax Credit is a non-refundable credit that allows people with a qualifying child to reduce their tax liability. You may qualify for both the Child Tax Credit and the Additional Child Tax Credit.
I sent IRS my Form 15110 and Schedule 8812. When will I get my refund? (updated Oct. 25, 2023)
IRS will review your completed Form 15110 PDF and Schedule 8812 and make a determination on your credit. If we deny your credit, we will send you a letter explaining why. However, if you owe no other amount, you should receive your refund in 8 to 10 weeks. If you don't hear from us after 8 to 10 weeks, call our toll-free line at 800-829-1954 to check on the status of your refund.
My child turns 18 this year. Can I still get the Child Tax Credit and the Additional Child Tax Credit?
No. Your child must be under age 17 at the end of the tax year in question to qualify for both the Child Tax Credit and the Additional Child Tax Credit.
Tips for next time you file
If you have dependent children, remember to claim the Additional Child Tax Credit the next time your file your Form 1040, U.S. Individual Income Tax Return. To do this, complete and send Form 1040 and Schedule 8812.
Consider filing your taxes electronically. Filing online can help you avoid mistakes and find applicable credits and deductions. In many cases you can file for free.
What to do next
- Write down the date on the letter today.
- Look the number up on irs.gov yourself. Don’t trust a link or phone number from anyone else.
- If it says you owe money or proposes changes to your return, take it to a licensed CPA, EA or tax attorney before that date.
Not advice. Not a filing. Verify with a licensed professional. Rules change by year and facts.