HMRC letter codes · National Insurance (CA)
CA82Appeal a National Insurance credits decision
Last reviewed 14 October 2026 · How Tax Letters checks its facts
In short
GOV.UK says to use form CA82 to appeal an HMRC decision on National Insurance credits.
“Use form CA82 to appeal an HMRC decision on National insurance credits”
GOV.UK: Appeal a National Insurance credits decision (CA82) · checked 14 October 2026
Information, not advice: this page reports what HMRC, GOV.UK and the bodies named publish about CA82. Each fact has its source and the day it was checked beside it.
What it is
GOV.UK says the CA82 form helps you give HM Courts and Tribunal Service all the information it needs to register your appeal.
“This form helps you give us all the information that HM Courts and Tribunal Service need to register your appeal.”
GOV.UK: Appeal a National Insurance credits decision (CA82) · checked 14 October 2026
GOV.UK says the CA82 covers appeals about credits decisions including home responsibilities protection, parents and carers, approved training and jury service.
“home responsibilities protection … parents and carers … approved training … jury service”
GOV.UK: Appeal a National Insurance credits decision (CA82) · checked 14 October 2026
What it asks
GOV.UK's CA82 page says you need to fill in the form fully before you can print it, and that you cannot save a partly completed form.
“You’ll need to fill in the form fully before you can print it. You cannot save a partly completed form”
GOV.UK: Appeal a National Insurance credits decision (CA82) · checked 14 October 2026
GOV.UK says that for CA82 you fill in the form on screen, print it and post it to HMRC.
“Fill in the form on screen, print it and post it to HMRC.”
GOV.UK: Appeal a National Insurance credits decision (CA82) · checked 14 October 2026
Free help and HMRC contacts
For help with National Insurance credits as a parent or carer, such as a question about CA82, GOV.UK’s National Insurance enquiries page says to call HMRC on 0300 200 3500. Lines are open Monday to Friday, 8am to 6pm, and the page links to “Find out about call charges”.
“Call HMRC for help and information with: … National Insurance credits if you’re a parent or carer … Telephone: 0300 200 3500 … Opening times: Monday to Friday, 8am to 6pm. … Find out about call charges”
GOV.UK: National Insurance: enquiries · checked 14 October 2026
Free help first
These routes are described by GOV.UK, TaxAid and Citizens Advice themselves.
- HMRC's extra supportHMRC offers extra support if your health condition or personal circumstances make it difficult to contact HMRC, for example a mental health condition, financial hardship or being treated in hospital.
- Someone to deal with HMRC for youYou can authorise a friend, relative or voluntary organisation to talk to HMRC for you and help you fill in forms.
- TaxAidTaxAid helps people with tax problems who cannot pay for advice. Tax Help for Older People merged with TaxAid in July 2025.
- Citizens AdviceCitizens Advice gives confidential advice online, over the phone and in person, for free.
- GOV.UK: Appeal a National Insurance credits decision (CA82) (checked 14 Oct 2026)
- GOV.UK: National Insurance: enquiries (checked 14 Oct 2026)
- GOV.UK: Get help from HMRC if you need extra support (checked 7 Oct 2026)
- GOV.UK: Appoint someone to deal with HMRC on your behalf (checked 7 Oct 2026)
- TaxAid: About us (checked 8 Oct 2026)
- Citizens Advice: About us (checked 7 Oct 2026)