HMRC letter codes · Tax credits (TC)
Tax credits (TC) letters and forms, explained by code
Last reviewed 14 October 2026 · How Tax Letters checks its facts
Codes on HMRC's tax credits letters and forms, starting TC, such as TC602, TC603R, TC610, TC846 and TC1131. Each code page reports what HMRC, GOV.UK or a recognised body publishes about it, with the source and the day it was checked beside each fact.
GOV.UK says tax credits ended on 5 April 2025 and no more payments will be made.
GOV.UK: Tax credits: general enquiries · checked 14 October 2026
Every Tax credits (TC) code
- TC600 Tax credits claim formHMRC's Tax Credits Manual lists TC600 as the tax credit claim form and supporting notes.
- TC602 Tax credits award noticeHMRC's Tax Credits Manual lists TC602 as the award notice, and TC602 Notes as the notes to accompany the award notice.
- TC603D Annual Declaration formHMRC's Tax Credits Manual says TC603D is an Annual Declaration form. It asks the customer to complete their income and benefits details and to say about any changes of circumstances, for one tax year at a time.
- TC603R Annual Review form and finalisation packHMRC's Tax Credits Manual says TC603R is an Annual Review form. It shows the calculation and the payments schedule of an award for the previous year.
- TC603UR Award Review form for ending a tax credits awardGOV.UK says the TC603UR notes help you end your tax credits award if you are claiming Universal Credit.
- TC607 Statement of AccountHMRC's Tax Credits Manual says TC607 is a Statement of Account. It tells customers of the decision to end their award and summarises the total payments or overpayment for the tax credit year.
- TC610 Notice to payHMRC's Tax Credits Manual says TC610 is the Notice to Pay. It is issued where tax credits have been overpaid and there is no continuing award.
- TC825 Income working sheetGOV.UK says the TC825 working sheet helps you calculate the total income you need to use for tax credits claims or renewals.
- TC846 Dispute recovery of an overpaymentGOV.UK says form TC846 is for telling HMRC you have received too much tax credits and do not think you should have to pay it back because you met your responsibilities and HMRC did not meet theirs.
- TC956 Disability helpsheetGOV.UK says the TC956 helpsheet explains the conditions you must meet to qualify for the disability element of Working Tax Credit and Child Tax Credit.
- TC689 Allow someone to help with your tax creditsGOV.UK says form TC689 is for when you want an intermediary, such as Citizens Advice, to help you with your tax credits.
- TC1131 Your tax credits overpaymentsGOV.UK's DWP guide says customers are told that their debt is moving to DWP in a letter called ‘Your tax credits overpayments’ (TC1131).
Information, not advice: these pages report what HMRC and GOV.UK say about each code. Your own letter comes first.
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.
Other series
- Self Assessment (SA)SA1, SA401, SA250, SA316, SA100 and more
- Corporation Tax (CT)CT600, CT603, CT41G, CT41G (Clubs), CT208 and more
- VATVAT1, VAT1A, VAT1B, VAT2, VAT7 and more
- National Insurance (CA)CA5603, CA5403, CA2490, CA4361, CA72A and more
- Child Benefit (CH)CH2, CH24A, CH105, CH995, CH459 and more
- Debt and payment letters (IDMS)IDMS99, IDMS99P, OCA43
- One-to-many lettersNISPAR1MM, LCL2REG2MM, CompC1LPLRMM, CompC1LPLR(A)MM, HEIPO2MM and more
- Compliance check factsheets (CC/FS)The factsheets HMRC's compliance letters name.
- Every HMRC letter codeAll the series on one page.
- HMRC Tax Credits Manual: TCM0316020, Extra information: forms (checked 14 Oct 2026)
- GOV.UK: Tax credits ended on 5 April 2025 (checked 14 Oct 2026)
- GOV.UK: Tax credits: general enquiries (checked 14 Oct 2026)
- GOV.UK: Tax credits: check your award notice (TC602(SN)) (checked 14 Oct 2026)
- GOV.UK: Tax credits: appeals and complaints (checked 14 Oct 2026)
- HMRC Tax Credits Manual: TCM0258120, Renewals - notices (checked 14 Oct 2026)
- GOV.UK: Tax credits: finalisation pack notes (checked 14 Oct 2026)
- GOV.UK: Tax credits: ending your award when Universal Credit is claimed (checked 14 Oct 2026)
- GOV.UK: Tax credits debt in Universal Credit (DWP) (checked 14 Oct 2026)
- GOV.UK: Tax credits overpayments (checked 14 Oct 2026)
- GOV.UK: Tax credits: payment enquiries (checked 14 Oct 2026)
- GOV.UK: Tax credits: income working sheet (TC825) (checked 14 Oct 2026)
- GOV.UK: Working out your income for tax credits (checked 14 Oct 2026)
- GOV.UK: Tax credits: dispute recovery of an overpayment (TC846) (checked 14 Oct 2026)
- GOV.UK: Tax credits disability helpsheet TC956 (checked 14 Oct 2026)
- GOV.UK: Apply for an increase in tax credits for a backdated disability benefit decision (checked 14 Oct 2026)
- GOV.UK: Tax credits: allow someone to help you with your award (TC689) (checked 14 Oct 2026)
- GOV.UK: Dealing with tax credits for someone else (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)